by Alan MacDonald (Author). Calling all Dirty Bertie fans! Dirty Bertie - the boy with nose-pickingly disgusting habits - is back for another helping of comic chaos! With ever-increasing madcap schemes and crazy capers, Bertie continues to delight his legions of fans who revel in his revolting ways. Join Bertie in Rats! his 23rd adventure, as he crosses paths with a cheeky rodent, takes part in a chaotic cross-country run, and tries to get his dog Whiffer to eat healthily - with disastrous results!