"It's a quiet night when Dylan takes his dog, Apollo, out for a walk in the backyard. Until the noise begins. Part bat screech, part insect buzz - it seems to be coming from the roof. Suddenly the sky is full of dark, beating shapes, and they're all headed straight for Dylan. Dr. Catalyst's newest creations are hungry, and only one thing will satisfy them. Blood"--P. [4] of cover.

Appeals to 5th-7th graders.

Reading level grade 4.