First published in 1955 in French, translated in 1956, this is the first American publication of the novel by the third pseudonym of the author, Stephen Frances [ISFDB]. A remainder, with corner cut off the front wrapper. Edge wear, toned pages, book store stamps and owner markings. 

Harold Newman was a loser. He was a plodding bank clerk whose past was weary and whose future was dull. Until the moment when his mind was activated by a warp in time and he became a super brain - a brilliant freak gifted with the power of twenty computers. Suddenly Harold's future wasn't dull anymore. It was deadly.