Only weeks after their return from the Secret Zoo, Noah and his friends must go back--and face their biggest challenge yet. With monstrous sasquatches freely attacking the denizens of the zoo and the evil Shadowist at large, the fate of the world is at stake. n nWhat Secrets Are Hiding in the Shadows?n nNoah and his friends thought they had seen it all during their first journey into the Secret Zoo--but it was only the beginning. Now they must train to become Crossers, members of a secret society who freely travel to the Secret Zoo and back, helping to defend its borders.

But now that the monstrous sasquatches are on the loose and the evil Shadowist is plotting destruction, will Noah, Megan, Ella, and Richie have what it takes to survive?n