How do you get the yellow book in Scooby Doo Spooky Swamp Wii?

Hello, I have the wii game,"Scooby-Doo and the Spooky Swamp". Romeno asked me to get three books, I have found blue and red. But, I can't get the yellow book in the gl box! I tried smashing, jumping, throwing boxes and other stuff. I can't solve it. PLEASE HELP!!!