Clifford D. Simak 
Clifford Simak SF Gateway Omnibus 

From the vaults of The SF Gateway, the most comprehensive digital library of classic SFF titles ever assembled, comes an ideal introduction to the work of one of the giants of the Golden Age, Clifford D. Simak.A regular contributor to ASTOUNDING SCIENCE FICTION throughout the influential John W. Campbell era, Simak produced a body of highly regarded work, winning the NEBULA and multiple HUGO AWARDs, and is best known for his story suite of future histories, City. This omnibus collects three novels that explore his favoured theme of a depopulated future: TIME IS THE SIMPLEST THING, A CHOICE OF GODS and the HUGO AWARD-winning WAY STATION.