Colleen A. F. Venable

Sasspants, a guinea pig, reluctantly agrees to act as a private investigator when Hamisher the hamster begs for her help in discovering who is stealing sandwiches from the pet shop's befuddled owner.

Katie is dreading the boring summer ahead while her best friends are all away at camp--something that's way out of Katie and her mom's budget, UNLESS Katie can figure out a way earn the money for camp herself. But when Katie gets a job catsitting for her mysterious upstairs neighbor, life get interesting. First, Madeline has 217 cats (!) and they're not exactly . . . normal cats. Also, why is Madeline always out EXACTLY when the city's most notorious...

"Mads is pretty happy with her life. She goes to church with her family, and minor league baseball games with her dad. She goofs off with her best friend Cat, and has thus far managed to avoid getting kissed by Adam, the boy next door. It's everything she hoped high school would be, until all of a sudden, it's not. Her dad is hiding something big--so big it could tear her family apart. And that's just the beginning of her problems: Mads is starting...

When guinea pig Sasspants leaves Mr. Venezi's pet shop to live with Detective Nichols, and hamster-detective Hamisher retires, the case of the missing bookstore cat must be solved without their help.

"Before Cat Ninja grew up and became Metro City's greatest defender, he was tiny, adorable Kitten Ninja and he battled...much tinier foes...our favorite feline hero takes on everything a kitten-size ninja has to battle on the way to his heroic destiny: a sun spot that won't stay put, an irresistible ball of yarn, and--every cat's archenemy--snow! "--

"Still training to be a sidekick, Katie protects the city against mysterious robot attacks--while trying not to feel like an outsider within her own friend group"--