Sweet Gabby, babysitter to "unsittable" children, faces two impossible challenges in her second adventure. She has been hired to babysit a little troll boy whose parents despise humans, and she cannot seem to win their trust. At the same time, bitter frenemy Madison Murray is trying to strong-arm her into providing a big-ticket item for the school orchestra's fund-raiser d she doesn't mind lying to get her way. Responsible, endlessly kind Gabby takes these unfair blasts rather to heart, beating herself up about not fulfilling obligations, before her instinctive knack for giving children what they need saves the day. In the end, thankfully, her confidence is boosted yet again, and a surprising gift in the final pages promises further installments.

Gr 4-6 Gabby Duran, alien babysitter, confronts a new challenge in this latest installment in the series. She faces off with a family of trolls who like to steal things just for fun. Unfortunately, things take a turn for the worse when Gabby's knapsack is stolen by her charge. The protagonist's efforts to get it back lead her to break some rules that endanger her new position and even her memories. And her nemesis Madison makes things worse by threatening to destroy her reputation if Gabby doesn't help her with the orchestra fund-raiser. The fun details about all the objects the trolls have stolen (including Amelia Earhart's plane) and the fun games that Gabby plays with Trymmy add a creative touch to the story. VERDICT Imaginative details and an action-packed plot make this a fun read for sci-fi loving young readers. Heidi Grange, Summit Elementary School, Smithfield, UT