In Dog We Trust by Neil Plakcy
Series: Golden Retriever Mysteries, Book 1.
Approx. 100,000 words.
Published on April 30, 2010.
Steve Levitan has returned home to Stewart's Crossing after a bad divorce and a brief prison term for computer hacking. He becomes friendly with his new next-door neighbor, Caroline Kelly, and her golden retriever, Rochester.
When Caroline is killed, Steve becomes the dog’s temporary guardian, and these two unlikely sleuths work to uncover the mystery behind Caroline’s death.