This is Book #1 of this new series by David A. Adler who writes the Cam Jansen books and a wonderful series of biographies for young readers. Meet Jeffrey Bones, boy detective. He's off on a shopping trip with his grandfather, carrying his detective bag filled with detective powder, magnifying glass and his trusty notepad, when suddenly, Jeffrey's bus driver, Mr. Green, shows up with a big problem. He has lost his bus, and he needs Detective Jeffrey Bones to solve the mystery. Other books in this series include Bones and the Dog Gone Mystery #2, Bones and the Cupcake Mystery, Bones and the Math Test Mystery, Bones and the Birthday Mystery, and Bones and the Dinosaur Mystery.