Ben Bril a'r Ddinas Ddirgel

Ben Bril is a fourteen year old boy. He is very clever, but he's interested only in science and in saving the world! People keep disappearing and reappearing changed. Of course it's a door into another world,and Ben Bril and Brochfael the Ninja set off to find it. Ben Bril is ideal for anyone who is just starting to read on their own.