With Moorepark Middle School's annual Speak Out Challenge approaching, Billy Broccoli plans to demonstrate mind reading with the help of his ghost friend Hoover Porterhouse, but when Billy starts spending more time with his new teammates than with Hoover, he may lose his secret weapon.

Another hilarious adventure for Billy and the Hoove from bestselling authors Henry Winkler and Lin Oliver! Billy Broccoli is used to getting expert advice--wanted or not--from the ghost with the most, Hoover Porterhouse! The Hoove has smooth moves and a silver tongue...and he isn't shy about sharing his words of wisdom! But when a night at the museum finds Hoover face-to-face with the ghost of a powerful Chumash Indian princess, his brain turns into...

Billy Broccoli is new to the neighborhood, and wants cool friends and a spot on the baseball team more than anything. But the one thing he never wanted is his own personal ghost. So imagine his surprise when he ends up sharing a room with Hoover Porterhouse a funny ghost with a whole lot of attitude. When an obnoxious school bully sets out to demolish Billy, the Hoove comes up with a plan for revenge. It's all in the Hoove's Rule Number Forty-Two:...