To Scratch a Thief — Jennifer L. Holm

Life is good for James Edward Bristlefur.

The sophisticated British secret agent cat is settling into his new home in New Jersey. He's become quite fond of his uncouth but loving new family. He's even gotten used to being called Mr. Stink. (Although he does not appreciate jokes about his new name, thanks very much.)

Then a dark shadow falls across his happy home. Someone is threatening Mr. Stink's new family -- a thief who leaves no pawprints. As James investigates the crimes, he realizes that a frightening old enemy lurks at the center of a web of conspiracy, plotting against him. Who is the hidden paw behind these misdeeds? And what grudge does he bear against our hero?

As every cat with a past knows, sometimes you need to sharpen your claws ...