Philip Jose Farmer 
Lord of the Trees 

An alternate-universe Tarzan seeks revenge on an all-powerful cabal in this science fiction adventure—a sequel to A Feast Unknown. He is Viscount Grandrith: member of the House of Lords, slayer of wild beasts, and righter of wrongs. Having tasted the elixir of life, he possesses near-immortal power—a power that comes with a dark affliction shared only by his half-brother, Doc Caliban. On his way to rediscover his childhood roots in Gabon, Lord Grandrith survives a thousand-foot plunge into shark-infested seas—an experience that revitalizes his taste for adventure. And that is just as well. For the Lord of the Trees has fallen into the grip of the Nine, grim and ancient rulers who control the world from afar . . . A partner novel to The Mad Goblin,  Lord of the Trees continues the strange saga that began with Philip José Farmer’s controversial novel A Feast Unknown.