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Received — 21 May 2026 ⏭ Project Gutenberg EBooks
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  • Newton's Principia : by Isaac Newton
    QR code "Newton's Principia: The Mathematical Principles of Natural Philosophy" by Isaac Newton is a three-volume work first published in 1687. Written in Latin, it presents Newton's laws of motion and universal gravitation, creating a mathematical foundation for classical mechanics. The work explains planetary motion, estimates celestial masses, accounts for tides and Earth's shape, and addresses comets' orbits. Considered among history's greatest scientific achievements,
     
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Newton's Principia : by Isaac Newton

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21 May 2026 at 20:43
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"Newton's Principia: The Mathematical Principles of Natural Philosophy" by Isaac Newton is a three-volume work first published in 1687. Written in Latin, it presents Newton's laws of motion and universal gravitation, creating a mathematical foundation for classical mechanics. The work explains planetary motion, estimates celestial masses, accounts for tides and Earth's shape, and addresses comets' orbits. Considered among history's greatest scientific achievements, it transformed scattered observations into systematic sciences of physics and astronomy, fundamentally altering humanity's understanding of the natural world. (This is an automatically generated summary.)

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Author Newton, Isaac, 1642-1727
Contributor Chittenden, N. W.
Translator Motte, Andrew, 1696-1734
Uniform Title Principia. English
Title Newton's Principia : The mathematical principles of natural philosophy
Original Publication New York: Daniel Adee, 1846.
Note Wikipedia page about this book: en.wikipedia.org/wiki/Philosophi%C3%A6_Naturalis_Principia_Mathematica
Credits Chris Curnow, John Welch, Laura Natal and the Online Distributed Proofreading Team at www.pgdp.net (This file was produced from images generously made available by The Internet Archive)
Reading Level Reading ease score: 10.3 (College graduate level). Very difficult to read.
Language English
LoC Class QA: Science: Mathematics
Subject Mechanics -- Early works to 1800
Subject Celestial mechanics -- Early works to 1800
Category Text
eBook-No. 76404
Release Date Jun 27, 2025
Last Update May 21, 2026
Copyright Public domain in the USA.
Downloads 1887 downloads in the last 30 days.

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  • Professor Unrat, oder, Das Ende eines Tyrannen by Heinrich Mann
    QR code "Professor Unrat, oder, Das Ende eines Tyrannen" by Heinrich Mann is a novel written between 1903 and 1904. It tells the story of Professor Raat, a tyrannical teacher nicknamed "Unrat" by his students and townspeople. When he discovers his pupils visiting a cabaret dancer named Rosa Fröhlich, he intends to confront her. Instead, he falls under her spell, abandoning his rigid principles and respectable position. What begins as obsession leads to marriage, fina
     
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Professor Unrat, oder, Das Ende eines Tyrannen by Heinrich Mann

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21 May 2026 at 20:43
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"Professor Unrat, oder, Das Ende eines Tyrannen" by Heinrich Mann is a novel written between 1903 and 1904. It tells the story of Professor Raat, a tyrannical teacher nicknamed "Unrat" by his students and townspeople. When he discovers his pupils visiting a cabaret dancer named Rosa Fröhlich, he intends to confront her. Instead, he falls under her spell, abandoning his rigid principles and respectable position. What begins as obsession leads to marriage, financial ruin, and ultimately revenge against the society that scorned him. (This is an automatically generated summary.)

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About this eBook

Author Mann, Heinrich, 1871-1950
Title Professor Unrat, oder, Das Ende eines Tyrannen
Note Wikipedia page on this work: de.wikipedia.org/wiki/Professor_Unrat
Credits Produced by Norbert H. Langkau, Jens Sadowski, Jana Srna
and the Online Distributed Proofreading Team at
www.pgdp.net
Reading Level Reading ease score: 83.0 (6th grade). Easy to read.
Language German
LoC Class PT: Language and Literatures: Germanic, Scandinavian, and Icelandic literatures
Subject Man-woman relationships -- Fiction
Subject Nightclubs -- Germany -- Fiction
Category Text
eBook-No. 35264
Release Date Feb 13, 2011
Last Update May 21, 2026
Copyright Public domain in the USA.
Downloads 6193 downloads in the last 30 days.

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  • The Road to Oz by L. Frank Baum
    QR code "The Road to Oz" by L. Frank Baum is a children’s fantasy novel written in the early 20th century. This enchanting tale follows Dorothy Gale, her loyal dog Toto, the Shaggy Man, Button Bright, and Polychrome, the Rainbow's Daughter, as they embark on a whimsical adventure along an enchanted road that leads to the Marvelous Land of Oz. Faced with odd characters and curious challenges, the group navigates this fantastical world while discovering friendship and
     
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The Road to Oz by L. Frank Baum

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21 May 2026 at 20:42
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"The Road to Oz" by L. Frank Baum is a children’s fantasy novel written in the early 20th century. This enchanting tale follows Dorothy Gale, her loyal dog Toto, the Shaggy Man, Button Bright, and Polychrome, the Rainbow's Daughter, as they embark on a whimsical adventure along an enchanted road that leads to the Marvelous Land of Oz. Faced with odd characters and curious challenges, the group navigates this fantastical world while discovering friendship and the importance of loyalty. At the start of "The Road to Oz," Dorothy is introduced along with a new character, the Shaggy Man, whom she encounters while trying to help him find the way to Butterfield. However, their journey swiftly transforms into a marvelous adventure as Dorothy realizes she and the Shaggy Man are lost on a multitude of strange roads. They soon meet Button-Bright, a boy without memories of his origins, and Polychrome, who describes herself as the Daughter of the Rainbow, each adding their charm to the storyline. As their collective journey unfolds, they experience delightful misadventures and peculiar encounters, setting the stage for a captivating exploration of friendship and bravery amidst the enchanting backdrop of Oz. (This is an automatically generated summary.)

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Author Baum, L. Frank (Lyman Frank), 1856-1919
Title The Road to Oz
Note There is an improved edition of this title, eBook #26624
Credits Produced by Warren Baldwin and Dennis Amundson.
Reading Level Reading ease score: 78.4 (7th grade). Fairly easy to read.
Language English
LoC Class PZ: Language and Literatures: Juvenile belles lettres
Subject Oz (Imaginary place) -- Juvenile fiction
Subject Fantasy literature
Subject Voyages and travels -- Juvenile fiction
Subject Uncles -- Juvenile fiction
Subject Magic -- Juvenile fiction
Subject Kings and rulers -- Juvenile fiction
Subject Farms -- Juvenile fiction
Subject Good and evil -- Juvenile fiction
Subject Animals, Mythical -- Juvenile fiction
Subject Gale, Dorothy (Fictitious character) -- Juvenile fiction
Subject Princess Ozma (Fictitious character) -- Juvenile fiction
Category Text
eBook-No. 485
Release Date Apr 1, 1996
Last Update May 21, 2026
Copyright Public domain in the USA.
Downloads 656 downloads in the last 30 days.

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  • A simplified presentation of Einstein's unified field equations by Tullio Levi-Civita
    QR code A simplified presentation of Einstein's unified field equations by Levi-Civita is a technical guide written in the early 21st century. The text likely focuses on preparing math-heavy HTML sources for publication, converting MathJax expressions to SVG images, and managing workflows for updates and corrections. The guide explains a tool-driven pipeline that converts MathJax-laden source HTML into a final HTML file with embedded SVG images, preserving the original TeX
     
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A simplified presentation of Einstein's unified field equations by Tullio Levi-Civita

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21 May 2026 at 20:42
QR code
A simplified presentation of Einstein's unified field equations by Levi-Civita is a technical guide written in the early 21st century. The text likely focuses on preparing math-heavy HTML sources for publication, converting MathJax expressions to SVG images, and managing workflows for updates and corrections. The guide explains a tool-driven pipeline that converts MathJax-laden source HTML into a final HTML file with embedded SVG images, preserving the original TeX in attributes for traceability. It illustrates how inline and display equations are transformed, shows the expected file and directory layout for projects, and outlines a post-processing fix to remove problematic SVG attributes for compatibility with ebook tools. It then details how to package and submit the final HTML and images alongside the preserved source, and provides a clear, step-by-step errata process for regenerating images and updating files when corrections are needed. (This is an automatically generated summary.)

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About this eBook

Author Levi-Civita, Tullio, 1873-1941
Translator Dougall, John, 1867-1960
Title A simplified presentation of Einstein's unified field equations
Original Publication London: Blackie & Son Limited, 1929.
Credits Produced by Laura Natal (Images generously made available by Hathi Trust.)
Language English
LoC Class QC: Science: Physics
Subject Gravitation
Subject Einstein, Albert, 1879-1955. Zur einheitlichen Feldtheorie
Subject Electromagnetism
Category Text
eBook-No. 78343
Release Date Apr 2, 2026
Last Update Apr 6, 2026
Copyright Public domain in the USA.
Downloads 362 downloads in the last 30 days.

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  • Peace medicine by W. C. Tuttle
    QR code Read online now Download for free For your e-reader or reading app — Kindle, Kobo, Apple Books, Calibre etc. EPUB3 ★ Recommended for most devices! Kindle → Use Send-to-Kindle Kobo, Nook etc → Transfer via USB Phone, tablet or computer → Open in a reading app Reading guide Other formats & older devices Plain Text (accessible) EPUB (older e-readers) EPUB (older e-readers, no images) Kindle Older Kindles
     
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Peace medicine by W. C. Tuttle

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21 May 2026 at 13:19
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Author Tuttle, W. C. (Wilbur C.), 1883-1969
Illustrator Schwieder, Arthur, 1884-1965
Title Peace medicine
Original Publication New York: The Ridgway Company, 1923.
Credits Prepared by volunteers at BookCove (bookcove.net)
Language English
Category Text
eBook-No. 78718
Release Date May 21, 2026
Copyright Public domain in the USA.
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  • An English Grammar by William Malone Baskervill and James Witt Sewell
    QR code "An English Grammar" by W.M. Baskervill and J.W. Sewell is an educational textbook aimed at high school, academy, and college students, written in the late 19th century. The book seeks to provide a clear and practical framework for understanding English grammar, addressing the complexities of the language in a manner that is accessible to young learners, while also striving to maintain scholarly rigor. The opening of the book presents a preface that outlines
     
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An English Grammar by William Malone Baskervill and James Witt Sewell

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21 May 2026 at 06:56
QR code
"An English Grammar" by W.M. Baskervill and J.W. Sewell is an educational textbook aimed at high school, academy, and college students, written in the late 19th century. The book seeks to provide a clear and practical framework for understanding English grammar, addressing the complexities of the language in a manner that is accessible to young learners, while also striving to maintain scholarly rigor. The opening of the book presents a preface that outlines the authors’ intent to bridge the gap between theoretical scholarship and practical language use. They note the abundance of existing grammar texts that may be too difficult for students and emphasize their goal of presenting grammatical concepts in a straightforward manner. The authors advocate for the incorporation of good literature into grammatical studies, positing that contact with quality writing enhances the student's grasp of language usage, including nouns, pronouns, and sentence syntax, which are structured in systematic parts throughout the text. This initial portion also highlights the evolving nature of English grammar, noting that rules may change over time and encouraging a flexible approach to the subject. (This is an automatically generated summary.)

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About this eBook

Author Baskervill, William Malone, 1850-1899
Author Sewell, James Witt, 1865-1955
Title An English Grammar
Credits Produced by Stephen Schulze and the Distributed Proofreaders Team
Reading Level Reading ease score: 73.9 (7th grade). Fairly easy to read.
Language English
LoC Class PE: Language and Literatures: English
Subject English language -- Grammar
Category Text
eBook-No. 14006
Release Date Nov 10, 2004
Last Update May 20, 2026
Copyright Public domain in the USA.
Downloads 1165 downloads in the last 30 days.

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  • The Silver Bar mystery by W. C. Tuttle
    QR code Read online now Download for free For your e-reader or reading app — Kindle, Kobo, Apple Books, Calibre etc. EPUB3 ★ Recommended for most devices! Kindle → Use Send-to-Kindle Kobo, Nook etc → Transfer via USB Phone, tablet or computer → Open in a reading app Reading guide Other formats & older devices Plain Text (accessible) EPUB (older e-readers) EPUB (older e-readers, no images) Kindle Older Kindles
     
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The Silver Bar mystery by W. C. Tuttle

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21 May 2026 at 06:56
QR code

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About this eBook

Author Tuttle, W. C. (Wilbur C.), 1883-1969
Title The Silver Bar mystery
Original Publication New York: Grosset & Dunlap, 1930.
Credits Prepared by volunteers at BookCove (bookcove.net)
Language English
Category Text
eBook-No. 78717
Release Date May 20, 2026
Copyright Public domain in the USA.
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