Sabre and the River of Doom — Bill Craig

Sabre and the River of Doom Having barely escaped from pursuit by the deadly Hawkmen of Hiratu, Paul Sabre, Shelly Newmar, and Reggie Morris find themselves adrift on the Amazon River with little to nothing in the way of supplies. Sabre draws on knowledge gained from his many adventures to keep them alive until they drift into a blackwater lagoon near an ancient city. With deadly headhunters on the prowl in the surrounding jungle, treasure hunters also arrive at the city, and Sabre must contend with all of them plus a mysterious guardian of this ancient city. Will he and his friends make it out alive? Or will Sabre and friends perish on the River of Doom?