The Price of the Phoenix

Captain Kirk is dead -- long live Captain Kirk!
Spock, Doctor McCoy and the other crewmen of the Starship Enterprise experience a stunning double shock. The first, painful blow is Captain Kirk's tragic death. Then, Captain Kirk's miraculous rebirth reveals the most awesome force the Enterprise has ever encountered. Spock is forced into a desperate gamble for Kirk's human soul against Omne -- the ultrahuman emperor of life beyond life, and death beyond hell.
A nerve-shattering voyage into unknown terror with the Starship Enterprise