On War By: Carl von Clausewitz

One Hundred Proofs That the Earth Is Not a Globe By: William Carpenter

Oracles of Nostradamus By: Charles A. Ward

Organic Evolution By: Richard Swann Lull

Our Atomic World: The Story of Atomic Energy By: C. Jackson Craven

Our Feathered Friends By: Elizabeth Grinnell

Outline of Science, Vol 4 By: J. Arthur Thomson

Passages from the Life of a Philosopher By: Charles Babbage

Philadelphia Negro: A Social Study By: W. E. B. Du Bois

Physics By: Aristotle

Pioneer Work in Opening the Medical Profession to Women By: Elizabeth Blackwell

Police Your Planet By: Lester del Rey

Popular Lectures on Scientific Subjects By: Hermann von Helmholtz

Popular Superstitions, and the Truths Contained Therein By: Herbert Mayo

Porto Rico: The Land of the Rich Port By: Joseph B. Seabury

Practical Talks by an Astronomer By: Harold Jacoby

Prehistoric Men By: Robert J. Braidwood

Prejudices, First Series By: H. L. Mencken

Preliminary Report on Neo-Fascist and Hate Groups By: House Un-American Activities Committee

Princes and Poisoners: Studies of the Court of Louis XIV By: Frantz Funck-Brentano

Psychology of Peoples: Its Influence on Their Evolution By: Gustave Le Bon

Psychology of the Unconscious By: Carl Gustav Jung

Psychotherapy By: Hugo Münsterberg

Queer Little Folks By: Harriet Beecher Stowe

Radioisotopes and Life Processes By: Renato Baserga

Radioisotopes in Medicine By: Earl W. Phelan

Raiders of the Universes By: Donald Wandrei

Random Reminiscences of Men and Events By: John D. Rockefeller

Recollections of Imperial Russia By: Meriel Buchanan

Red Reign: The True Story of an Adventurous Year in Russia By: Kellogg Durland

Report of the National Advisory Commission on Civil Disorders (Kerner Commission Report) By: National Advisory Commission on Civil Disorders

Report of the President's Commission on the Accident at Three Mile Island By: President's Commission on the Accident at Three Mile Is

Report on Securing and Growing the Digital Economy By: The Commission on Enhancing National Cybersecurity

Report to the President by the Presidential Commission on the Space Shuttle Challenger Accident By: Presidential Commission on the Space Shuttle Challenger

Republic (version 2) By: Plato (Πλάτων)

Researches into the Physical History of Man By: James Cowles Prichard

Revolted Woman By: Charles George Harper

Rip Foster Rides the Gray Planet By: Harold L. Goodwin

Romance of Modern Astronomy By: Hector Macpherson

Romance of Modern Electricity By: Charles R. Gibson

Romance of Modern Engineering By: Archibald Williams

Romance of Modern Geology By: Edwin Sharpe Grew

Romance of Modern Invention By: Archibald Williams

Romance of Modern Mechanism By: Archibald Williams

Romance of Modern Photography By: Charles R. Gibson

Romance of the Romanoffs By: Joseph Martin McCabe

Rural Magazine and Literary Evening Fire-Side Vol 1 No 1 By: Various

Sabotage in Space By: Carey Rockwell

Safeguarding children: pediatric medical countermeasure research By: Presidential Commission for the Study of Bioethical Iss

Salvage in Space By: Jack Williamson

Save the Girls By: Mason Long

Science - History of the Universe Vol. 1: Astronomy By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 2: Geology By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 3: Physics & Electricity By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 4: Chemistry By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 5: Biology By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 6: Zoology & Botany By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 7: Anthropology & Medicine By: Francis Rolt-Wheeler

Science - History of the Universe Vol. 8: Mathematics By: Francis Rolt-Wheeler

Science in Short Chapters By: W. Mattieu Williams

Sea Stories for Wonder Eyes By: Mary Earle Hardy

Secret of Everyday Things By: Jean-Henri Fabre

Secrets of the Woods By: William Joseph Long

Seed-Babies By: Margaret Warner Morley

Seeking a Human Spaceflight Program Worthy of a Great Nation By: Review of U.S. Human Space Flight Plans Committee

Selection of 19th Century Scientific Verse By: Various

Sexes in Science and History By: Eliza Burt Gamble

Short Discourse Concerning Pestilential Contagion, and the Methods to Be Used to Prevent It By: Richard Mead

Sidelights on Relativity By: Albert Einstein

Silent Sentinels: Protective Relays for A-C and D-C Systems By: Westinghouse Electric and Manufacturing Company

Six Months In Mexico By: Nellie Bly

Sketches of Imposture, Deception, and Credulity By: Richard Alfred Davenport

Skylark Three By: E. E. Smith

Sleeping Sickness By: Fleming Mant Sandwith

Smithsonian Institution - United States National Museum - Bulletin 240 Contributions From the Museum of History and Technology Papers 34-44 on Science and Technology By: Various

Social Life in England 1750-1850 By: F. J. Foakes-Jackson

Social Settlement Movement in Chicago By: Josephine Hunt Raymond

Society as I Have Found It By: Ward McAllister

Song of the Cardinal By: Gene Stratton-Porter

Soul of London By: Ford Madox Ford

Soul or Rational Psychology By: Emanuel Swedenborg

Southern Horrors: Lynch Law In All Its Phases By: Ida B. Wells-Barnett

Space Platform By: Murray Leinster

Special Report on Negro Domestic Service in the Seventh Ward Philadelphia By: Isabel Eaton

Stand by for Mars By: Carey Rockwell

Star Stories for Little Folks By: Gertrude Chandler Warner

Status Quo By: Dallas McCord Reynolds

Stories of Birds By: Lenore Elizabeth Mulets

Stories of Starland By: Mary Proctor

Stories of the Cave People By: Mary Marcy

Story of the Atlantic Cable By: Sir Charles Bright

Strangest Things in the World: A Book About Extraordinary Manifestations of Nature By: Thomas R. Henry

Stratagems and The Aqueducts of Rome By: Sextus Julius Frontinus

Stray Feathers From a Bird Man's Desk By: Austin L. Rand

Struggles and Triumphs, or Forty Years' of Recollections of P.T. Barnum, written by Himself By: P. T. Barnum

Studies About Trees By: Jacob Joshua Levison

Studies in the Psychology of Sex, Volume One By: Havelock Ellis

Study of British Genius By: Havelock Ellis

Suffragette: The History of the Women's Militant Suffrage Movement By: E. Sylvia Pankhurst

Supreme Cases from 1803-2018 By: United States Supreme Court