Kroll takes a subject that is difficult to explain and presents it in a fairly palatable tale. Mouse and her friends decide to play tug-of-war after watching kids at recess. First, though, they have to decide how to make both sides equal. They try dividing up by meat-eaters and plant-eaters; then they try those that have fur versus those without. Neither of these solutions works. Then they try three animals on each side. Of course, the larger ones win. Finally, they line up on the teeter-totter, shifting sides until the board balances. With both teams equal, the effort to win the tug-of-war is also equal. Neither side is victorious until Bear is distracted by the buzz of bees. Though predictable in a number of ways, the story still has enough plot tension to keep children reading. The illustrations, done in pastel shades, have a certain charm that young readers will find inviting. At the end of the book, Kroll gives the four definitions of equal from the viewpoints of math, art, the law, and team sports. This is an additional purchase for those collections needing more math-related books.–Elaine Lesh Morgan, Multnomah County Library, Portland, OR Copyright c Reed Business Information, a division of Reed Elsevier Inc. All rights reserved.