| Four Months Afoot in Spain
Harry Alverson Franck | |
| Four Months Among the Gold-Finders in Alta California / Being the Diary of an Expedition From San Francisco to the Gold Districts
Henry Vizetelly | |
| Four Months Besieged: The Story of Ladysmith
Henry H. S. Pearse | |
| Four Months in a Sneak-Box / A Boat Voyage of 2600 Miles Down the Ohio and Mississippi Rivers, and Along the Gulf of Mexico
Nathaniel H. Bishop | |
| Four Months in Libby and the Campaign Against Atlanta
I. N. Johnston | |
| Four Mystery Plays
Rudolf Steiner | |
| Four New Pocket Gophers of the Genus Cratogeomys from Jalisco, Mexico
Robert J. Russell | |
| Four Phases of Love
Paul Heyse | |
| Four Phases of Morals: Socrates, Aristotle, Christianity, Utilitarianism
John Stuart Blackie | |
| Four Pigeons / Captains All, Book 7.
W. W. Jacobs |
