Attack of the Drones by Michael Dahl

Zak Nine and Erro have escaped! But now they find themselves lost in a vast forest of alien birds and deadly plants. Things get even worse when they hear strange buzzing sounds just above the treetops attack drones! The prison guards are searching for the boys using a flock of remote bots, armed with flame-throwers and sleeping gas. Will the boys outwit the bots and find a way off Planet Alcatraz? The exotic flora and fauna just might provide a solution to the high-tech hazards hunting our heroes.
Binding: Paperback / softback