Grum! Grum is a chapter book for grades 3-6. It is a story of two girls who discover magical bubble gum. The gum takes them on a series of magical and hilarious mishaps, such as sleeping with slugs, a magic pizzaria in the middle of the desert, a troll who needs help fixing his bridge. Children love this book.One reader commented about her favorite part of this book, "It is as adventurous as "Coraline", as delicious as "Charlie and the Chocolate Factory", and funnier than "Diary of a Wimpy Kid" Enjoy!