Mystery and Storytelling in One Package

Try these books if you're looking for:

• mystery, suspense, action
• good storytelling
• well-written stories

The Amazing Maurice and His Educated Rodents 
Terry Pratchett
YA F Pratchet
A talking cat, intelligent rats, and a strange boy cooperate in a Pied Piper scam until they try to con the wrong town and are confronted by a deadly evil rat king.

The Kraken Project 
Douglas Preston
F Preston
When a NASA accident kills seven scientists and enables a self-modifying artificial intelligence to escape into the Internet, Wyman Ford and the AI's creator, Melissa Shepherd, struggle to keep the evolving program out of the hands of scheming Wall Street traders.