Meet Crank and Al ... robots on the run.

They arrive at the ancient city of Tarka, a flooded city behind a great wall. Hoping to discover Robotika, where robots can be free, instead they end up trapped between the mysterious underwater Aquanauts and the cruel Crodilus ...

A refreshed cover look for this well-loved series, illustrated by the incomparable Mark Oliver. Read on with The Tin Man, Tunnel Racers, Razorbites, Powerball and The Ghost Sea.