Space Taxi - Wendy Mass

Archie Morningstar fights crime across the universe alongside his dad and a talking cat. In this book, the trio must disguise themselves as aliens and rescue a princess!

When an adventure-seeking princess turns up missing, Archie Morningstar, his dad, and Pockets the cat must go deep undercover. Archie and Pockets have to follow the clues to solve the case. The hardest part is not getting caught!