ENGINE OF CHANGE

Middle school inventor Rube Goldberg and his friends attempt to save their town from the nefarious Null Corporation.

In this third book in the Rube Goldberg and His Amazing Machines series, the quirky tween sets his mind to his biggest project yet: saving the town of Beechwood. After spotting what looks like a giant robot at the junkyard and finding plans detailing the closure of Beechwood Middle School, Rube rallies his friends to investigate. Rube’s misfit friend group is still likable; Pearl is a natural, determined leader, in contrast to Boob’s hopeless goofball nature. Rube’s widowed father, previously never around and constantly traveling for work, returns home—and stays put—for this installment, even engaging in meaningful conversations with his son. There are plenty of plot twists, and the mystery is strong enough to keep series fans turning pages. That said, the stakes never feel high, and the villain’s motivations feel flimsy, even though the story revolves around how the entirety of the town is threatened. The danger is discussed in broad terms but without the necessary specificity to make readers feel truly invested. Rube’s machines aren’t front and center, dampening the appeal for readers drawn to that element of the stories. Busy black-and-white illustrations add little to the overall reading experience. Pearl is Black; other main characters are white, and racial diversity is cued among the supporting cast.

An interesting if shallow mystery.