Mystery of the Desert Giant

When a giant green creature appears in the Arizona desert, the Hardy Boys find themselves embroiled in one of their most intriguing and dangerous cases. The brothers' investigation takes them from the desert to a large man-made mountain full of tunnels and secret entrances, and finally to a shocking discovery about the 'desert giant'. This book is number 19 in Applewood Books's series of facsimile reprints of the original Hardy Boys series.