The author presents the "real" version of Doc Savage, Doc Caliban. He's the half-brother of Lord of the Trees (Tarzan) and, like his English cousin, is immortal, because of a group who called themselves "The Nine". Some of these other immortals are over 40,000 years old. And one of them, an ancient dwarf named XauXaz, is at war with the others. They had voted to interfere with humanity and help with the pollution problem to save the environment-but the dwarf wants mortals to kill themselves off. Doc is accompanied by companions Pauncho and Barney, then sons of his original colleagues, and they encounter quite a few hazards, including a huge grizzly bear, which they battle in hand-to-hand combat.
As with LORD OF THE TREES, the counterpart to this story, which involves "Tarzan", this is a highly entertaining, "R-rated" version of a familiar character. Highly recommended.