You might want to take a look at cartoonist Mark Anderson’s comparison of various business cartoon collections, including The New Yorker’s. As you might expect, even the non-New Yorker books contain quite a few New Yorker cartoonists. There just isn’t that much single-panel work out there anymore!

Also, while looking for something else, I came across this archive of pieces about James Thurber, and also quite a nice little collection of New Yorker-related photos and factlets, along with audio recordings of some of the writers mentioned.