Finn and the Subatomic Slip-And-Slide

From the New York Times bestselling author of the Sisters Grimm and NERDS comes the third and final book in the time-jumping, universe-skipping, action-packed middle grade series with equal parts humor and heart! After his adventures through time, Finn returns home to a world he doesn't recognize. Changing the past has created an all-new present, one in which he and his friends never vanquished the Plague.