Book five in the intergalactic science-based chapter book series from New York Times bestselling author Wendy Mass and Michael Brawer! Archie Morningstar fights crime across the universe alongside his dad and Pockets the talking cat. In Archie's fifth adventure, Pockets is in a all the tuna fish sandwiches on Akbar's Floating Rest Stop have been stolen! He thinks it's the fault of the irritating head of his alien fan club, but Archie suspects the mystery goes much deeper. Get ready for another thrilling and hilarious space adventure!