- Golden Fleece and the Heroes Who Lived Before Achilles, The, by Padraic Colum
- King of Ireland's Son, The, by Padraic Colum
- Mark Twain, Biography, 1835-66, by Paine
- Mark Twain, Biography, 1866-75, by Paine
- Mark Twain, Biography, 1875-86, by Paine
- Mark Twain, Biography, 1886-1900, by Paine
- Mark Twain, A Biography, 1900-1907, by Paine
- Mark Twain, A Biography, 1907-1910, by Paine
- Mark Twain, A Biography, by Paine
- Boys' Life of Mark Twain, The, by Paine
- Tip Lewis and His Lamp , by Pansy (aka Isabella Alden)
- A Collection of Scotch Proverbs, by Pappity Stampoy
- Autobiography of a YOGI, by Paramhansa Yogananda
- Pierre And His People, by Parker
- Romany Of The Snows, by Parker
- Give Me Liberty Or Give Me Death, by Patrick Henry
- Sheridan Road Mystery, The, by Paul and Mabel Thorne
- Cosmopolis, by Paul Bourget
- Travels in England & Fragmenta Regalia, by Paul Hentzner and Sir Robert Naunton
- Andrea Delfin A Venetian novella, by Paul Heyse
- Janice Meredith, by Paul Leicester Ford
- Marvels of Modern Science, by Paul Severing
- Madame Aubin, by Paul Verlaine
- Purgatory of St. Patrick, The, by Pedro Calderon de la Barca
- Wonder-Working Magician, The, by Pedro Calderon de la Barca
- Life Is A Dream, by Pedro Calderon de la Barc
- A Damsel in Distress, by Pelham Grenville Wodehouse
- Psmith, Journalist, by Pelham Grenville Wodehouse
- Epical Songs, by Pencho Slaveykov
- Olaf van Geldern, by Pencho Slaveykov
- Noto, by Percival Lowell
- Soul of the Far East, The, by Percival Lowell
- Princess Maritza, by Percy Brebner
- Daemon of the World, The, by Percy Bysshe Shelley
- Peter Bell the Third, by Percy Bysshe Shelley
- Complete Poetical Works of Percy Bysshe Shelley, The, by Percy Bysshe Shelley
- Witch of Atlas, The, by Percy Bysshe Shelley
- A Defence of Poetry and Other Essays, by Percy Bysshe Shelley
- Master Detective, The, by Percy James Brebner
- Master Detective, The, by Percy James Brebner
- Brown Mask, The, by Percy J. Brebner
- Brown Mask, The, by Percy J. Brebner
- Tom Slade, by Percy K. Fitzhugh
- Cappy Ricks, by Peter B. Kyne
- Cappy Ricks Retires, by Peter B. Kyne
- Long Chance, The, by Peter B. Kyne
- Valley of the Giants, The, by Peter B. Kyne
- Voyages of Peter Esprit Radisson, by Peter Esprit Radisson
- Satyricon of Petronius Arbiter, by Petronius Arbiter (Translated by Firebaugh)
- Akbar, by Petrus Abraham Samuel van Limburg Brouwer
- Love Among the Chickens, by P. G. Wodehouse
- Indiscretions of Archie, by P. G. Wodehouse
- Clicking of Cuthbert, The, by P. G. Wodehouse
- Coming of Bill, The, by P. G. Wodehouse
- Gold Bat, The, by P. G. Wodehouse
- Head of Kay's, The, by P. G. Wodehouse
- Little Warrior, The, by P. G. Wodehouse
- Man Upstairs and Other Stories, The, by P. G. Wodehouse
- A Prefect's Uncle, by P. G. Wodehouse
- Pothunters, The, by P. G. Wodehouse
- Psmith in the City, by P. G. Wodehouse
- Swoop! or How Clarence Saved England, The, by P. G. Wodehouse
- Tales of St. Austin's, by P. G. Wodehouse
- Three Men and a Maid, by P. G. Wodehouse
- White Feather, The, by P. G. Wodehouse
- Prince and Betty, The, by P. G. Wodehouse
- Man With Two Left Feet, The, by P. G. Wodehouse
- Not George Washington, by P. G. Wodehouse
- William Tell Told Again, by P. G. Wodehouse
- Adventures of Sally, The, by P. G. Wodehouse
- Mike, by P. G. Wodehouse
- Something New, by P.G. Wodehouse
- Intrusion of Jimmy, The, by P.G. Wodehouse
- Little Nugget, The, by P.G. Wodehouse
- Uneasy Money, by P.G. Wodehouse
- Piccadilly Jim, by P.G. Wodehouse
- Art of Living in Australia, The, by Philip E. Muskett
- Now It Can Be Told, by Philip Gibbs
- Augsburg Confession, The, by Philip Melanchthon, 1497-1560
- Apology of the Augsburg Confession, The, by Philip Melanchthon
- Sir Francis Drake Revived, by Philip Nichols
- A Defence of Poesie and Poems, by Philip Sidney
- Zibeline, by Phillipe de Masa
- Poems on Various Subjects, Religious and Moral, by Phillis Wheatley
- Polyeucte, by Pierre Corneille
- An Iceland Fisherman, by Pierre Loti
- Pecheur d'Islande, by Pierre Loti
- Egypt (La Mort De Philae), by Pierre Loti
- Madame Chrysantheme, by Pierre Loti
- Story of a Child, The, by Pierre Loti
- Ramuntcho, by Pierre Loti
- Les chansons de Bilitis, by Pierre Lou˙s
- Sayings of the Fathers, by Pirke Aboth
- What is Property?, by P. J. Proudhon
- Mutual Aid, by P. Kropotkin
- Native Life in South Africa, by Plaatje
- Republic, The, by Plato
- Charmides, by Plato
- Critias, by Plato
- Laches, by Plato
- Lysis, by Plato
- Timaeus, by Plato
- Alcibiades I, by Plato
- Meno, by Plato
- Crito, by Plato
- Cratylus, by Plato
- Gorgias, by Plato
- Ion, by Plato
- Lesser Hippias, by Plato
- Menexenus, by Plato
- Phaedo, by Plato
- Phaedrus, by Plato
- Philebus, by Plato
- Laws, by Plato
- Apology, by Plato
- Parmenides, by Plato
- Protagoras, by Plato
- Sophist, by Plato
- Statesman, by Plato
- Symposium, by Plato
- "Theaetetus", by Plato
- Euthyphro, by Plato
- Euthydemus, by Plato
- Captiva and The Mostellaria, The, by Plautus
- Complete Works Volume 3: Essays and Miscellanies, The, by Plutarch
- A Fool There Was, by Porter Emerson Browne
- United States Presidents' Inaugural Speeches, by Presidents From Washington to Clinton
- Complete State of the Union Addresses, from 1790 to the Present, by Presidents of the United States
- Memoirs, by Prince De Joinville
- Two Years in the Forbidden City, by Princess Der Ling
- Legends and Lyrics 1st Series, by Proctor
- Legends and Lyrics 2nd Series, by Proctor
- Siksha-Patri of the Swami-Narayana Sect , The, by Professor Monier Williams (Trans.)
- Carmen, by Prosper Merimee
- Colomba, by Prosper Merimee
- A General History for Colleges and High Schools, by P. V. N. Myers
- Advice to a Mother on the Management of her Children, by Pye Henry Chavasse