Ninja Princess Detectives: Case of the Stinkies

Something strange is happening at Dragon Elementary. Teachers are whispering, Principal Knight is extra sweaty, and someone swears something was flying above the playground! Ava and Gabby Danger are on the case! Readers in grades 1-4 will help the girls follow the clues and put on their thinking crowns to solve the mystery. Can they figure out what's going on before things get any weirder?