Tim is distressed to learn that his mom, new stepfather, and grandmother are sure Granddad has Alzheimer's disease. Refusing to accept the possibility that they may be right, Tim persuades Granddad to run away with him on a fishing trip, convinced this will prove that Granddad is still capable of taking care of himself. But on the way to the lake, Granddad keeps forgetting things: their equipment, the soft drinks, even how to make change at the roadside store. When Granddad can't get them out of a dangerous situation on the water but instead makes the problem worse, Tim finally realizes his grandfather has changed . . . but his awareness may have come too late. Well-developed characters and page-turning suspense ensure that this riveting yet poignant novel will hold readers captive.