Curt Siodmak 
Riders to the Stars [EPUB ebook] 

Three men, each driven by secret reasons, volunteered to take the strangest trip since the beginning of time:GORDON-filled with a need for power, enough power to wipe out the memory of an earlier terrible shame.LOCKWOOD-to whom life was worth very little without Susan-maybe it was worth nothing at all.STANTON-a man haunted by the knowledge that a special and mysterious fate awaited him.Behind them were their pasts. Ahead of them-infinity.In this different and suspense-filled novel, the author of Donovan’s Brain tells the story of a strange quest whose outcome might mean the difference between survival and extinction for mankind.