Grim, Grunt and Grizzle-Tail (Barefoot Books Monsters Series #6)

One day, a frustrated king flies into a rage and turns his mischievous daughters into oranges. The gruesome monsters Grim and Grunt decide they'd like to get their hands on the princesses, and bully their little brother, Grizzle-Tail, into stealing the girls. Who will rescue the princesses from the monsters' clutches?