From the New York Times bestselling author of The Sisters Grimm and The Weirdies comes the second installment in this a wildly imaginative middle-grade adventure series with aliens, robots, and a pair of pajamas that might just be the key to the past! When Finn is saved from the Time Rangers by an older version of himself, it comes with a catch. Old Man Finn needs Finn and his friends, Lincoln and Julep, to help him win battles he lost years ago against the Paradox, a terrible creatures obsessed