Do you have what it takes to be a tough truck? Rev up those engines with Hensel and Gretel authors Corey Rosen Schwartz & Rebecca Gomez and Will Bear Share? creator Hilary Leung! *Two trucks off to school for their first day of class. One riding the brakes. One hitting the gas.*Mack and Rig couldn't be more different.One loves the fast lane. The other, the off-ramp.But when they're forced to pair up on their first day of school, can Mack and Rig figure out a way to get along and learn what it really means to be a tough truck?Get ready to vroom and zoom your way to fun and friendship with these two lovable and tough trucks!