The Ava and Gabby Danger: Ninja Princess Detectives collection features princesses who love martial arts and solving mysteries in their castle, their classroom, and beyond in the Kingdom of Klue. This 5-book collection for readers in grades 1-4 includes one of each of the following books:-Hot Diggity Dog Gone-Fishing for Clues-Case of the Stinkies-Palace Puzzler-Froggy FiascoEach 48-page book measures 5" x 7".Princesses Ava and Gabby Danger love martial arts and putting on their thinking crowns to solve mysteries in their castle, their classroom, and beyond in the Kingdom of Klue. Joined by their sidekick, Erk, a frog they will never kiss even if he might be a prince—ick!—the ninja princess detectives find the clues, follow their hunches, and save the day.