"Jake and his worred zoology exploration team, the X-Venture Xplorers, head to Sumatra to find their new team mate, Tazen, is missing. At the same time, a cadre of chimpanzees show up in Yellowstone National Park! Pandas and sloth bears and spider monkeys all over the world are acting strange and aggressive.... some serious monkey business is surely afoot! Join the X-Venture Xplorers as they discover who would win in a clash between bears and gorillas and follow the biological clues to locate their lost friend."--Publisher.