Descent from Xanadu — Harold Robbins

A decadent billionaire pursues immortality in this raucous, raunchy, globe-hopping novel by “the dirty old man of American letters” (Hollywood Reporter).

The wealthiest man in the world, Judd Crane is also ruthless, sexually irresistible, and determined to conquer man's last frontier -- eternal life. A man who always gets what he wants, Judd pursues his dream on a dangerous, obsessive journey from Yugoslavia to China, from his lush private island to a secret atomic city in the Brazilian jungle.

Crane is willing to spend billions, risk death, outwit foreign agents, lose his entire empire and the woman he loves . . . until, at the moment of victory, he discovers the most important secret of all.