In a challenging workout for Where's Waldo? fans a Canadian cartoonist offers 82 teeming scenes in pairs that are identical only at first glance. Presented side by side on tall, floppy pages bound at the top, each pair of paintings has 20 small differences for sharp-eyed viewers to identify. They feature dozens of, usually, tiny rabbits in human dress swarming through city or country settings in various seasons. These differences range from an airport worker's warning sign here that is blank there and changing numbers in an arithmetic problem on a chalkboard in front of a "school" of marine creatures to a swarm of diminutive Santas constructing a "Trojan Rudolph" with a nose that's glowing in only one view. Mercifully, Bùi describes all the changes in every pair at the end. Smaller hands will have difficulty wrestling with the ungainly format, but the figures and action are depicted with fine-lined exactitude, and there's plenty of stage business and visual humor to keep even browsers uninterested in playing the intended game amused. Too big for back-seat entertainment or to tuck into a parental backpack as a portable means of distraction--but rewarding to pore over in roomier situations. (Picture book. 6-9)

Gr 1-4 Children who enjoy searching for Waldo will take pleasure in studying the intricate pictures in this title and finding the 20 differences between the two (almost) identical illustrations on every page. Forty-one pairs of clear and colorful pictures are shown side-by-side or one atop the other. Perusers will be intrigued with the delicately detailed, action-packed scenes. Vignettes include the countryside, downtown on a snowy day, a fish market, an airport, and a three-ring circus. Rabbits and carrots play a major role in the pictures, but robots, dinosaurs, and even a Christmas-themed "Trojan Rudolph" are featured. The engaging artwork includes much humor, such as in the "Art Show": a wall painting features Carrot Soup in imitation of Andy Warhol's famous Campbell's Soup Can (Tomato) , and the Mona Lisa sports rabbit ears. This tall, bound-at-the-top picture book includes a helpful "Puzzle Solutions" section for children unable to decipher all the differences or who want to confirm those found. It should keep them occupied for hours. Maryann H. Owen, Racine Public Library, WI