I know Elaine at Random Jottings has read Edmund Crispin, but I have yet to, although he has been on my list since I noted this from P.D. James (see Talking About Detective Fiction):
"Crispin's books are always elegantly written with a cast of engaging, witty characters. Most readers at some point in the story will laugh aloud. Crispin is a farceur, and the ability to successfully combine this less-than-subtle humour with murder is very rare in detective fiction."
Baroness James says Crispin's work has deservedly lasted beyond the Golden Age, and she cites his 1946 book The Moving Toyshop as his most ingenious. Mr. C. happens to be reading it just now on the recommendation of a friend and he says it's quite quirky and academic - reminiscent of Cyril Hare and Michael Innes - it contains a number of fourth wall jokes, and is very entertaining. Interestingly, the book is dedicated thus: "For Philip Larkin in friendship and esteem"; the two were contemporaries at St. John's College, Oxford.
Have you read Edmund Crispin?