The Total Eclipse of Nestor Lopez by Cuevas

All twelve-year-old Nestor Lopez wants is to live in one place for more than a few months and have dinner with his dad, an Army sergeant deployed in Afghanistan. When he and his mother move to a new town to live with his grandmother, Nestor plans to lay low, and he certainly has no intention of letting anyone find out his deepest secret—that he can talk to animals. But when the animals in town start disappearing, and Nestor's grandmother is spotted in the woods where they were last seen, suspicion mounts against her. Nestor learns that they are being taken by a tule vieja, a witch who bites animals to gain their power, and his extraordinary ability is put front and center as he tries to catch the real culprit and clear his grandmother's name.