Books in Harvard Classics (sorted alphabetically)
- Odyssey of Homer Homer
- Odyssey Homer
- On the Origin of Species Charles Darwin
- On the Origin of Species by Means of Natural Selection Charles Darwin
- On the Origin of Species By Means of Natural Selection Charles Darwin
- Origin of Species by Means of Natural Selection Charles Darwin
- Pascal's Pensées Blaise Pascal
- Pathfinder; Or, The Inland Sea James Fenimore Cooper
- Pepita Jiménez (Spanish) Juan Valera
- Phaedo Plato
- Phaedra Jean Racine
- Philaster; Or, Love Lies a Bleeding Francis Beaumont and John Fletcher
- Pilgrim's Progress John Bunyan
- Pilgrim's Progress from this world to that which is to come John Bunyan
- Plays of Sophocles: Oedipus the King; Oedipus at Colonus; Antigone Sophocles
- Plutarch: Lives of the noble Grecians and Romans Plutarch
- Plutarch's Lives, Volume 1 (of 4) Plutarch
- Plutarch's Lives, Volume 2 (of 4) Plutarch
- Plutarch's Lives, Volume 3 (of 4) Plutarch
- Poems and Songs of Robert Burns Robert Burns
- Poetical Works of John Milton John Milton
- Polyeucte Pierre Corneille
- Portrait of a Lady — Volume 1 Henry James
- Prefaces and prologues to famous books : with introductions, notes and illustrations
- Pride and Prejudice Jane Austen