Algis Budrys 
Man of Earth 

His only escape was to become another man!Allen Sibley was a frightened little man – frightened for his life. In the corrupt, swindling world of cutthroat big business in which he was an important and pseudo-respectable figure, Allen Sibley had made the unforgivable error – he had found out. And worse, someone had known this would happen, someone who waited quietly to collect Allen Sibley’s entire fortune in exchange for a gamble – but it was the only gamble which might save Sibley his life!