Sly the Sleuth and the Pet Mysteries (Sly the Sleuth Series #1) Book

There are some strange new pets in Sly's neighborhood: a cat on a diet that keeps getting fatter, a fish that seems angry at its owner, and a peculiar pet named Wilson that suddenly disappears!
Only Sly the Sleuth can solve these mysteries. Grade-schooler by day, private detective by afternoon, Sly (a.k.a Sylvia) uses her sharp wits and reasoning skills to get to the bottom of these odd goings-on.
Donna Jo Napoli teams up with her son, Robert Furrow, and illustrator Heather Maione to create a heroine who is not only smart and spunky, but also tremendously funny.

School Library Journal

Gr 2-3-Young Sly forms her own detective agency to solve mysteries in the neighborhood. However, she only takes on cases that will also interest her cat, Taxi. The three cases presented here involve a variety of pets. Sly observes as well as she listens, and when she mixes in some creative problem solving, voila! Maione's pen-and-ink illustrations add plenty of personality. All in all, this is a promising start to a mystery series for beginning chapter-book readers.-Pat Leach, Lincoln City Libraries, NE Copyright 2005 Reed Business Information.