The Adventures of Emery Jones, Boy Science Wonder
From National Book Award-Winner Charles Johnson

When ten-year-old genius Emery Jones accidentally sends his nemesis Chippy 190 million years back in time, he's not sure he can reverse the process--or if he even wants to. Will Emery and his artistic best friend Gabby risk travelling to the Triassic Period to rescue a bully like Chippy? With a kindly professor and a rapping robot on their team, you never know what might happen, 'cause Emery's got the brains and the technology for bending time...