Jack Williamson 
Dragon’s Island 

Dane Belfast is a young scientist seeking the whereabouts of a missing geneticist and family friend.A visit to the mysterious Cadman Corporation results in his being drugged and whisked off to a secret location called Dragon’s Island, where "not-men" and other strange creatures — as well as human geniuses — seem to be created. Dane can’t tell who to trust in this fast-paced adventure, which is the first novel to use the term "genetic engineering".