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.