Mercy Watson, beloved porcine wonder, meets Francine Poulet, “the best animal control officer in the history of the world.” When Mercy discovers freshly planted pansies next door, what can she do but eat them? Never mind that the pansies belong to the next-door neighbors, pig-loving Baby and her pig-hating sister, Eugenia. When the furious Eugenia sees the incriminating pansy petals on Mercy’s chin, her anger gets the best of her and she reports Mercy to Animal Control. The officer, beak-nosed Poulet, is energized by the challenge of adding a new animal to her life capture list. DiCamillo’s comic timing coupled with Van Dusen’s familiar, over-the-top gouache depictions of the emotional Mercy and her caring, buttered-toast-bearing “parents” make this a welcome addition to the popular series. Fifteen very short action-packed chapters make this a fine step up for readers ready for a slightly more challenging read than Henry and Mudge. (Fiction. 7-10)