My declared commitment for Michelle's Challenge to complete authors for letters A-M (last name). I generally go with half the alphabet even though I will try for every letter. I usually have to cheat on the letter X. There are few authors whose last name starts with X and even fewer in mystery genres I like--so I'll probably wind up sticking an X wherever it will work.
Here's my list of commitment authors:
A: The Darling Dahlias & the Cucumber Tree by Susan Wittig Albert (6/5/15)