I enjoy reading the novelization of movies most of the time because you get additional scenes that didn't make into the film. This is good read in that way, filling in some spots that they couldn't rightly get into the movie.
No one on the Enterprise can believe that Mr. Spock is gone!
As the crew grieves for Mr. Spock, the awesome Genesis Device, now controlled by the Federation, has transformed an inert nebula into a new planet teeming with life. But Genesis can also destroy existing worlds.
The creators of the Device want it given freely to the Galaxy. But Starfleet Command fears that it will become a force for evil. And the enemies of the Federation will not rest until they seize it--as their most powerful weapon in the battle to conquer the Galaxy!