The Secret Zoo is an incredible world, hidden beneath the regular Clarksville Zoo, where animals and humans peacefully coexist as equals. It is full of marvels. But even in the Secret Zoo, there are dangers . . . and forbidden places.  When Noah and his friends discover tarantulas roaming around, he’s sure the bad omen can only mean one thing: the Shadowist is nearby. Closing the portals is the only option to save all the animals at Clarksville City Zoo—and Noah’s world. But when Mr. Darby and the Descenders are unsuccessful in destroying the portals, Noah realizes that the Secret Zoo is going to war. The Secret Zoo: The Final Fight is the sixth and final book in Bryan Chick’s The Secret Zoo series. A fast-paced, imaginative, and adventurous story perfect for fans of fantasy and animal stories as well as reluctant readers.