Plot summary

On a winter vacation in Jamaica, the Hardy Boys begin a dangerous adventure when an ancient bronze death mask is discovered near their beach house (where Frank comically loses and finds his underwear) The case takes them from Jamaica to their hometown of Bayport to Casablanca to Marrakesh. They meet William along the way, a kind African who is willing to help them uncover secrets of the mask, which they find out is Jamaican property.

William scares off the enemies of the Hardy Boys in Swahili, telling them he is an even more powerful Juju man then theirs and eventually Mr. Hardy comes after Frank and Joe thought he was dead. Back at the Celliers', they celebrate and Christine, the gorgeous, black-haired teen who also assisted them in solving the case lets the Hardys call home to their worrying mother and Aunt Gertrude. William even receives a wild dog as a present for saving the Hardys from the predicament.

• Publication date: 1975
• Ghostwriter: Andrew E. Svenson
• Summary: The boys' discovery of an ancient bronze death mask in Jamaica leads to adventures in North Africa.