Jack Chalker books are not for the faint of heart. They're strongly sexually oriented. They have explicit passages of erotic mind control, sexual enslavement drugs, etc.
They took the body of Park Lacoch and stripped away his mind, transferring the mind of a top Confederacy operator to his brain. They they stuck him aboard a spaceship and exiled him to Charon, one of the Worlds of the Warden Diamond, from which no man could ever return. A mysterious organism on those worlds infected everything, making life away from them impossible afterwards.
Charon was a hell-world in literal fact. It was too near its sun, making life all but unbearable in its hot, steamy atmosphere. Strange beasts roamed its jungles - and stranger still, the group known as the Witchcraft plotted with the Lord in exile to take over the planet.
There witchcraft was real - for on Charon, magic worked! The Warden organism could be made to perform almost any feat under the control of a skilled witch or sorcerer - as Park Lacoch discovered when he was transformed into a changeling - a half-beast half-man, with the beast rapidly gaining ascendancy.
After that, his assignment really became difficult.
This paperback book is in good condition with spine creases and cover wear.
This is a 1983 first edition with cover art by David B. Mattingly. [author:Jack L. Chalker!]