What would it be like if your grandfather turned up in your house as a 13-year-old boy?
For sixth-grader Ellie, this leads to a recognition of the importance of the cycle of life and the discovery of her own passion for science. After her scientist grandfather finds a way to regain his youth, he’s denied access to his lab and must come to live with Ellie and her mother. Although he looks young, his intellect and attitudes haven’t changed. He still tells Ellie’s mother what to wear and when to come home, and he loathes middle school even more than Ellie does. There’s plenty of opportunity for humor in this fish-out-of-water story and also a lesson on the perils as well as the pluses of scientific discovery. Divorced parents, a goth friend and a longed-for cellphone birthday present are among the familiar details setting this story firmly in the present day, like Holm’s Year Told Through Stuff series, rather than in the past, like her three Newbery Honor–winning historical novels. The author demonstrates understanding of and sympathy for the awkwardness of those middle school years. But she also gets in a plug for the excitement of science, following it up with an author’s note and suggestions for further exploration, mostly on the Web.
Appealing and thought-provoking, with an ending that suggests endless possibilities. (Science fiction. 10-14)