A conflict between two herbivores might not sound like much of a battle, but when those plant eaters are powerful animals like a kangaroo and a gorilla, one can envision a real clash. Discoveries about the lives of these animals will enthrall young readers as they try to guess which might triumph in an imaginary encounter between the two. Accessible text with stunning statistics highlights important science concepts. Powerful, eye-catching images help maintain enthusiasm for the newly learned information.