George, aged nine, and Timmy the puppy continue their adventures in this exciting story. Someone is on George's island. She and Timmy have discovered a mysterious footprint in the sand. Creeping up on a pair of crooks hiding out, they overhear them planning a robbery. But before George and Timmy can row for help, George is spotted and captured! Can Timmy help her escape? These prequels are an ideal lead up to the Famous Five books for contemporary 7-10 year old readers. George was Enid Blyton's favourite and most fully realised character, whom she based on herself. Timmy was based on her own spaniel, Laddie.