Some other mysteries...depending of course on your personal tastes for sub-genre, writing style, etc...
I've read and enjoyed at least one title in each of these series or by each of these authors, but YMMV.
- Jane Dentinger's Jocelyn O'Rourke theater themed series
- all three of Susan Dunlap's series
- Brian Fremantle's Charlie Muffin series
- most of Jacqueline Girdner's Kate Jasper series
- a few John Dickson Carr titles
- L. A. Morse's Sam Hunter titles
- a bunch of Dorothy Salisbury Davis titles
- the second, but not the first, of Harriet Hahn's James the Cat series (I've read the first and enjoyed, so this works for me...)
- some of the Benny Cooperman series by Howard Engel