When animals of different species are at odds, their unique adaptations are on display. The creatures in this popular, action-packed collection are unlikely opponents, but an imaginative "matchup" allows readers to discover their traits and weigh in on who might be the winner in a real-life clash. An eye-catching design and loads of thought-provoking statistics will excite readers about bizarre beast battles comparing strength, size, intelligence, and more. Featured animals, such as the great white shark, Tyrannosaurus rex, and boa constrictor, were selected for their high-interest appeal. Features include: Bite-size fact boxes and thrilling photographs of animals make this a motivating set for developing readers. Each volume encourages readers to construct an opinion about "the winner" using fact-based evidence. Animal adaptations are a key component of elementary science curricula, including the Next Generation Science Standards.