Rex's parents have split up, he's about to make the scary move to secondary school, and to make matters worse he has to spend his summer holiday on a remote and rainy Irish island - with lots of sheep for company. The only upside: he'll be staying with his strange and brilliant Uncle, Derm. Then Rex discovers Uncle Derm is going to rob the island's travelling bank! And he needs Rex's help... 8+ Perfect for fans of Frank Cottrell Boyce and David Walliams.