The Time Goblin (Brave Dave, Band 2)

Deep within his basement Tariq fine tunes the controls of the Concretonator. Away in the corner Brave Dave cowers not sure what to expect, and so he should. When soggy lettuce, shredded tyres, cement and high pressure hoses fall into the hands of an insomniac tortoise, trouble may lay ahead. Brave Dave for one sure doesn't doubt it, but he's willing to try anything if it can help him with his wind problem.
Brave Dave is series of contemporary comic fantasies for YA audiences and adults alike.