Joe Dever - Lone Wolf 8 - The Jungle of Horrors - US edition - B/B+/B
Lone Wolf series by Joe Dever, first published in 1987 by Arrow Books. After the harrowing events at Kazan-Oud, you now venture into the Danarg — a pestilent jungle-swamp where the next Lorestone lies hidden in the ruins of Ghol Tabras.