Alan Bradley. I haven't found the mysteries themselves to be all that complex, but the character of Flavia is absolutely marvelous. Imagine that Eloise was raised by Sherlock Holmes and Jo March and you get an idea of what this young lady is like. She is clever, and a genuinely kind and caring person. Her sisters, however, are a trial and sometimes they get the better of her good intentions. These are often the funniest bits of the novels.
The novels to date are:
The Sweetness at the Bottom of the Pie
The Weed That Strings the Hangman's Bag
A Red Herring Without Mustard
I am Half Sick of Shadows (which is still in my to-be-read pile)
I'm not generally a fan of books narrated by kids, but Flavia is a wise beyond her years and an excellent observer which makes her an ideal narrator for a mystery. She also can't seem to stay out of trouble.
This post is part of the Crime Fiction Alphabet 2012 at Mysteries in Paradise.