Books about Man-woman relationships -- Fiction (sorted alphabetically)
- Place of Honeymoons Harold MacGrath
- Plague of the Heart Francis Prevost
- Planet in Reverse Henry Guth
- Planet of Sand Murray Leinster
- Plashers Mead: A Novel Compton MacKenzie
- Pledged to the Dead Seabury Quinn
- Poet Meredith Nicholson
- Pollony Undiverted Sydney J. Van Scyoc
- Poor Gentleman Mrs. Oliphant
- Poor Man Stella Benson
- Port of Adventure C. N. Williamson and A. M. Williamson
- post-girl Edward Charles Booth
- power of sympathy: or, The triumph of nature. Founded in truth. William Hill Brown
- Powers and Maxine C. N. Williamson and A. M. Williamson
- Pretty Quadroon Charles L. Fontenay
- prey of the strongest Morley Roberts
- Price She Paid David Graham Phillips
- prince of space Jack Williamson
- Prince Otto, a Romance Robert Louis Stevenson
- Princess M. G. McClelland
- Princess De Montpensier Madame de La Fayette
- princesse de Monpensier (French) Madame de La Fayette
- Princess Elopes Harold MacGrath
- Princess of Chaos Bryce Walton
- Princess of Thule William Black