- Popular Adventure TalesAuthor: Mayne ReidReleased on Project Gutenberg: June 1, 2008
- Popular Law-making: A study of the origin, history, and present tendencies of law-making by statuteAuthor: Frederic Jesup StimsonReleased on Project Gutenberg: May 1, 2004
- Popular Tales from the NorseAuthor: Peter Christen Asbjørnsen, Jørgen Engebretsen Moe, Dasent, George Webbe, SirReleased on Project Gutenberg: September 1, 2005
- Port O' Gold: A History-Romance of the San Francisco ArgonautsAuthor: Louis J. (Louis John) StellmanReleased on Project Gutenberg: June 1, 2004
- PossessedAuthor: Cleveland MoffettReleased on Project Gutenberg: July 26, 2007
- Post HasteAuthor: R. M. (Robert Michael) BallantyneReleased on Project Gutenberg: June 6, 2007
- Post-Augustan Poetry From Seneca to JuvenalAuthor: Harold Edgeworth ButlerReleased on Project Gutenberg: November 1, 2005
- Post-Prandial PhilosophyAuthor: Grant AllenReleased on Project Gutenberg: July 8, 2006
- Posthumous Works of the Author of A Vindication of the Rights of WomanAuthor: Mary Wollstonecraft, William GodwinReleased on Project Gutenberg: October 29, 2007
- Postmark GanymedeAuthor: Robert SilverbergReleased on Project Gutenberg: May 27, 2008
- Potash & Perlmutter: Their Copartnership Ventures and AdventuresAuthor: Montague GlassReleased on Project Gutenberg: April 13, 2006
- Potash and Perlmutter Settle ThingsAuthor: Montague GlassReleased on Project Gutenberg: November 28, 2006
- Potterism: A Tragi-Farcical TractAuthor: Rose MacaulayReleased on Project Gutenberg: February 1, 2004
- Potts's Painless Cure: 1898Author: Edward BellamyReleased on Project Gutenberg: September 21, 2007
- Power of Mental Imagery: Being the Fifth of a Series of Twelve Volumes on the: Applications of Psychology to the Problems of Personal and: Business EfficiencyAuthor: Warren HiltonReleased on Project Gutenberg: September 2, 2007
- Power Through ReposeAuthor: Annie Payson CallReleased on Project Gutenberg: August 1, 2003
- Practical ArgumentationAuthor: George K. (George Kynett) PatteeReleased on Project Gutenberg: September 1, 2004
- Practical English Composition: Book II.: For the Second Year of the High SchoolAuthor: Edwin L. (Edwin Lillie) MillerReleased on Project Gutenberg: May 6, 2007
- Practical EssaysAuthor: Alexander BainReleased on Project Gutenberg: January 23, 2006
- Practical EthicsAuthor: William De Witt HydeReleased on Project Gutenberg: January 20, 2008
- Practical Exercises in EnglishAuthor: Huber Gray BuehlerReleased on Project Gutenberg: May 1, 2004
- Practical Forestry in the Pacific Northwest: Protecting Existing Forests and Growing New Ones, from the Standpoint of the Public and That of the Lumberman, with an Outline of Technical MethodsAuthor: E. T. (Edward Tyson) AllenReleased on Project Gutenberg: June 25, 2006
- Practical Grammar and CompositionAuthor: Thomas WoodReleased on Project Gutenberg: September 11, 2007
- Practical Mechanics for BoysAuthor: James Slough ZerbeReleased on Project Gutenberg: August 11, 2007
- Practical Mysticism: A Little Book for Normal PeopleAuthor: Evelyn UnderhillReleased on Project Gutenberg: June 8, 2007
- Practical Pointers for PatenteesAuthor: Cresee, Franklin AllisonReleased on Project Gutenberg: September 20, 2007
- Practical Rules for the Management of a Locomotive Engine: in the Station, on the Road, and in cases of AccidentAuthor: Charles Hutton GregoryReleased on Project Gutenberg: August 28, 2006
- Practical Suggestions for Mother and HousewifeAuthor: Marion Mills Miller, Theodore WatersReleased on Project Gutenberg: September 1, 2005
- Practical taxidermyAuthor: Montagu BrowneReleased on Project Gutenberg: July 9, 2008
- Practice Book, Leland Powers SchoolAuthor: Leland Todd PowersReleased on Project Gutenberg: December 1, 2003
- Praetor's LunchAuthor: DomReleased on Project Gutenberg: May 1, 2004
- PragmatismAuthor: D. L. (David Leslie) Murray, F. C. S. (Ferdinand Canning Scott) SchillerReleased on Project Gutenberg: February 1, 2004
- Pragmatism: A New Name for Some Old Ways of ThinkingAuthor: William JamesReleased on Project Gutenberg: February 1, 2004
- Prairie Farmer, Vol. 56: No. 1, January 5, 1884.: A Weekly Journal for the Farm, Orchard and FiresideAuthor: VariousReleased on Project Gutenberg: January 14, 2006
- Prairie Farmer, Vol. 56: No. 3, January 19, 1884.: A Weekly Journal for the Farm, Orchard and FiresideAuthor: VariousReleased on Project Gutenberg: July 10, 2007
- Prairie FlowersAuthor: James B. (James Beardsley) HendryxReleased on Project Gutenberg: July 30, 2007
- Prairie FolksAuthor: Hamlin GarlandReleased on Project Gutenberg: February 27, 2007
- Pratt's Practical Pointers on the Care of Livestock and PoultryAuthor: Pratt Food CompanyReleased on Project Gutenberg: September 25, 2005
- Prayers and MeditationsAuthor: Bahá'u'lláhReleased on Project Gutenberg: November 2, 2005
- Prayers Written At Vailima, and A Lowden Sabbath MornAuthor: Robert Louis Stevenson, Fanny Van de Grift StevensonReleased on Project Gutenberg: August 1, 1996
- Preaching and PaganismAuthor: Albert Parker FitchReleased on Project Gutenberg: June 16, 2005
- Precaution: A NovelAuthor: James Fenimore Cooper, William Cullen BryantReleased on Project Gutenberg: December 1, 2003
- PrecipitationsAuthor: Evelyn ScottReleased on Project Gutenberg: October 1, 2003
- Preface to a Dictionary of the English LanguageAuthor: Samuel JohnsonReleased on Project Gutenberg: April 1, 2004
- Preface to Major Barbara: First Aid to CriticsAuthor: Bernard ShawReleased on Project Gutenberg: February 1, 2003
- Preface to ShakespeareAuthor: Samuel JohnsonReleased on Project Gutenberg: April 1, 2004
- Preface to the Works of Shakespeare (1734)Author: Mr. (Lewis) Theobald, Hugh G. (Hugh Gilchrist) DickReleased on Project Gutenberg: July 22, 2005
- Prefaces and prologues to famous booksAuthor: Charles William Eliot, Francis Bacon, Jean Calvin, Caxton, William, Condell, Henry, -Released on Project Gutenberg: August 15, 2004
- Prefaces to FictionAuthor: Benjamin Boyce, Argens, Jean-Baptiste de Boyer, marquis d', Samuel Derrick, Mrs. (Mary de la Rivière) Manley, M. de (Georges) ScudéryReleased on Project Gutenberg: December 30, 2004
- Prehistoric Textile Art of Eastern United States: Thirteenth Annual Report of the Beaurau of American Ethnology to the Secretary of the Smithsonian Institution 1891-1892, Government Printing Office, Washington, 1896, pages 3-46Author: William Henry HolmesReleased on Project Gutenberg: November 27, 2006
- Prehistoric Textile Fabrics Of The United States, Derived From Impressions On Pottery: Third Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1881-82, Government Printing Office, Washington, 1884, pages 393-425Author: William Henry HolmesReleased on Project Gutenberg: December 22, 2005
- Preliminary Announcement & List of Members: Society for Pure English, Tract 01 (1919)Author: Society for Pure EnglishReleased on Project Gutenberg: May 1, 2004
- Preliminary Report of the Commission Appointed by the University of Pennsylvania to Investigate Modern Spiritualism: In Accordance with the Request of the Late Henry SeybertAuthor: University of Pennsylvania. Seybert Commission for Investigating Modern SpiritualismReleased on Project Gutenberg: April 1, 2004
- Preludes 1921-1922Author: John DrinkwaterReleased on Project Gutenberg: May 1, 2004
- Prescott of SaskatchewanAuthor: Harold Bindloss, W. Herbert DuntonReleased on Project Gutenberg: June 28, 2008
- Present at a Hanging and Other Ghost StoriesAuthor: Ambrose BierceReleased on Project Gutenberg: August 1, 2003
- President Wilson's AddressesAuthor: Woodrow Wilson, George McLean HarperReleased on Project Gutenberg: December 31, 2005
- Press CuttingsAuthor: Bernard ShawReleased on Project Gutenberg: May 1, 2004
- Pressure, Resistance, and Stability of Earth: American Society of Civil Engineers: Transactions, Paper No. 1174, Volume LXX, December 1910Author: Meem, J. C.Released on Project Gutenberg: October 25, 2005
- Prester JohnAuthor: John BuchanReleased on Project Gutenberg: August 1, 1996