Synthezoids — David Robbins

Three Warriors have fallen, stricken by a mysterious malady. To save them, another Warrior must lead four green trainees into the last place on Earth any sane person would venture....the Valley of Shadow.Once the domain of a madman, the fog-shrouded stew of virulent toxins harbors creatures born of nightmare. To make it there alive is the ultimate challenge. To make it out again is a feat few have achieved.The 30th book in the long running ENDWORLD series, SYNTHEZOIDS is chock full of the action, excitement and humor fans have come to expect.