Lawrence Clark Powell was an American librarian, literary critic, bibliographer and author of more than 100 books. Powell "made a significant contribution to the literature of the library profession, but he also writes for the book-minded public. His interests are reflected in the subjects that recur throughout his writings; these are history and travel, especially concerning the American Southwest, rare books, libraries and librarianship, the book trade, and book collecting."

Edward Flanders Robb Ricketts was an American marine biologist, ecologist, and philosopher. Renowned as the inspiration for the character Doc in John Steinbeck's 1945 novel Cannery Row, Rickett's professional reputation is rooted in Between Pacific Tides (1939), a pioneering study of intertidal ecology. A friend and mentor of Steinbeck, they collaborated on and co-authored the book, Sea of Cortez (1941).