Description :-

Format : Paperback
ISBN-13 : 9789123691289
 
The Secret Seven Collection 1: Books 1-3 (Secret Seven Collections and Gift books)
Book 1: The Secret Seven (first published in 1949)
Book 2: Secret Seven Adventure (first published in 1950)
Book 3: Well Done, Secret Seven (first published in 1951)

The Secret Seven Collection 2: Books 4-6 (Secret Seven Collections and Gift books)
Book 4: Secret Seven on the Trail (first published in 1952)
Book 5: Go Ahead, Secret Seven (first published in 1953)
Book 6: Good Work, Secret Seven (first published in 1954)

The Secret Seven Collection 3: Books 7-9 (Secret Seven Collections and Gift books)
Book 7: Secret Seven Win Through (first published in 1955)
Book 8: Three Cheers, Secret Seven (first published in 1956)
Book 9: Secret Seven Mystery (first published in 1957)

The Secret Seven Collection 4: Books 10-12 (Secret Seven Collections and Gift books)
Book 10: Puzzle For The Secret Seven (first published in 1958)
Book 11: Secret Seven Fireworks (first published in 1959)
Book 12: Good Old Secret Seven (first published in 1960)