James Blish SF Gateway Omnibus

Best known for his Hugo Award-winning classic A Case of Conscience, Blish was one of the first serious SF writers to involve themselves with tie-in novels, writing eleven Star Trek adaptations as well as the first original adult Star Trek novel, Spock Must Die. This omnibus contains three of his long out-of-print works: Black Easter, The Day After Judgement and The Seedling Stars.
BLACK EASTER: ...