The Curse of the Two-Headed Bull(1975)
(Book 15 in the Story of the Phantom series)
A novel by Lee Falk
To touch this ancient treasure can mean death - yet the safety and well-being of an entire people depend on their retaining possession of it. What is the mystery of the priceless two-headed bull for which men fight and die? When the priceless object suddenly disappears, the Phantom and his beautiful sweetheart, Diana, are drawn into a fantastic adventure that leads from the jungle to the harem of a potentate.
Used availability for Lee Falk's The Curse of the Two-Headed Bull
1656 : USA Mass Market Paperback