Books about Friendship -- Juvenile fiction (sorted alphabetically)
- Phaeton Rogers: A Novel of Boy Life Rossiter Johnson
- Phantom Yacht Carol Norton
- Phebe, Her Profession Anna Chapin Ray
- Phyllis: A Twin Dorothy Whitehill
- Pirate City: An Algerine Tale R. M. Ballantyne
- Playmate Polly Amy Ella Blanchard
- Pollyanna Grows Up Eleanor H. Porter
- Polly Oliver's Problem Kate Douglas Smith Wiggin
- Pool of Stars Cornelia Meigs
- Princess Polly At Play Amy Brooks
- Princess Polly's Gay Winter Amy Brooks
- Princess Polly's Playmates Amy Brooks
- Quest of the Golden Pearl J. R. Hutchinson
- Quicksilver Sue Laura Elizabeth Howe Richards
- Quicksilver: The Boy With No Skid to His Wheel George Manville Fenn
- Radio Girls on Station Island: The wireless from the steam yacht Margaret Penrose
- Rainbow Valley L. M. Montgomery
- Rainbow Valley L. M. Montgomery
- Rajah of Dah George Manville Fenn
- Ralph Raymond's Heir Jr. Horatio Alger
- Rambler club in the mountains W. Crispin Sheppard
- Rambler Club's aeroplane W. Crispin Sheppard
- Ranch Girls and Their Great Adventure Margaret Vandercook
- Ranch Girls at Boarding School Margaret Vandercook
- Real Gold: A Story of Adventure George Manville Fenn