The Secret Zoo: Secrets and Shadows (Secret Zoo, 2, Band 2)

Book two in this fast-paced and exciting series for middle grade fantasy, mystery, and animal buffs.
Noah 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?
The author originally had the idea for The Secret Zoo when he was nine and wondered what would happen if zoo exhibits had secret doors that allowed kids to go inside—and the animals to come outside. He brings that sense of adventure and excitement to this story, making it a favorite for home and classroom reading along with such middle grade fantasy favorites as The One and Only Ivan.