There are quite a few on the MMM list I haven't read. Time to add to the old TBR list. For my money, the library is always the perfect place for a spot of murder.
My own favorite mayhem in the library books?: The Miss Zukas mysteries by Jo Dereske.
Link to the Fantastic Fiction site and a complete list of the excellent Miss Zukas mysteries. (This is a series that should be read in order.)