When the animals escape Gotham City Zoo, Batman calls on Robin and Nightwing for backup. Turns out, the runaway beasts are under the mind-control powers of the evil Gorilla Grodd! Can the Bat-Family quickly curtail this animal attack, or are the Caped Crusaders in for a wild ride? With easy-to-read text and full-colour illustrations, this exhilarating series is a must-read for all young superhero fans!