Solve the mystery with the Secret Seven - everyone's favourite detective club!This fantastic bumper collection contains Secret Seven books 4-6, with illustrations by Tony Ross. Book 4: Secret Seven on the Trail (first published in 1952)Something mysterious is going on at Tigger's Barn, and the Seven are intrigued.When Jack overhears a strange conversation, it's time for the Seven to leap into action ... Book 5: Go Ahead, Secret Seven (first published in 1953)What exactly is the sinister-looking man up to and why does he want to get George into trouble?Will the Seven get to the bottom of the mystery before it's too late?Book 6: Good Work, Secret Seven (first published in 1954)A car is stolen and Peter and Janet are the only witnesses.But have the Seven got themselves too deep into a mystery that is beyond their powers to solve?These timeless stories are perfect for young fans of mystery, adventure or detective series.