What has the author Roy J Westlake written?

Roy J. Westlake is a pseudonym used by several authors, so it's hard to say definitively what *he* has written.

Here's a breakdown of the known uses of the name:

* Donald E. Westlake used the pseudonym "Roy J. Westlake" to write the John Dortmunder series of comedic crime novels. This includes titles like *The Hot Rock*, *The Fugitive Pig*, and *The Busy Body*.

* Robert L. Fish also used the "Roy J. Westlake" name to write the Mike Hammer novels after the original author, Mickey Spillane, stopped writing the series.

Therefore, it's important to specify which "Roy J. Westlake" you are referring to. If you are interested in the John Dortmunder series, you are looking for the works of Donald E. Westlake. If you are interested in the Mike Hammer series, you are looking for the works of Robert L. Fish.