"Get ready for more hilarity in the fourth book of the uproarious series from Roald Dahl Funny Prize-winning author Philip Ardagh and the illustrator of The Gruffalo, Axel Scheffler.
Throughout their adventures, the Grunts have managed to accumulate their fair share of enemies. Thankfully, all of these adversaries have been safely locked away... or have they? A prison break-out changes everything, as three of their foes are now seeking revenge. It's time for the Grunts to embark on a wild and wacky run for their lives.
This last installment of the series brings back some familiar faces and unravels a few lingering mysteries. Get ready for a sidesplitting and action-packed conclusion!"