Q. Patrick, Quentin Patrick, Patrick Quentin, and Jonathan Stagge are all kinda sorta the same person, or perhaps “person”. They were pseudonyms shared by a shifting coterie of writers, mostly Richard Webb and Hugh Wheeler, the latter later laboring with Steven Sondheim splendidly. Anyway, a whole raft of their books, from the 1930s to the 1950s are suddenly available. I have read four so far, and they were all good. Recommended for fans of GAD. Amazon, or if your library has it, Hoopla.
Related, with more.