Leon Lontoc

The Leiningen South American cocoa plantation is threatened by a 2-mile-wide, 20-mile-long column of army ants.

Two American divers are distracted by fair ladies and skulduggery while trying to salvage a gold ship off Jamaica.

In 1936, a Dutch physician who treats leprosy patients in the jungles of Indonesia has a dangerous run-in with a local witch-doctor who uses black magic to kill his enemies.