por Mel Lyle
A Power Boys Adventure, de Mel Lyle, reúne 6 livros em ordem de leitura.
The Mystery of the Haunted Skyscraper
1964
The Mystery of the Flying Skeleton
The Mystery of the Burning Ocean
1965
The Mystery of the Million-Dollar Penny
The Mystery of the Double Kidnapping
1966
The Mystery of the Vanishing Lady
1967