[...] The latest Modern Masters volume covers Frazer Irving (TwoMorrows Publishing, [...]

It’s recounted rather nicely in The Ten-Cent Plague, though that version of the story repeats the claim that Mad was turned into a magazine to circumvent the Code, which Gaines himself said was a myth. (He said they switched to magazine format at Kurtzman’s request, and that escaping the Code in the process was a happy accident.)

Also famously, the Code red-flagged the phrase “a wandering Wolfman” in a DC book — and when DC responded that no, Wolfman was in fact the writer’s name, that led to DC starting to put writer/artist credits in its books.