As a young man eager to make his mark in Manhattan, Republican front-runner Donald J. Trump wore maroon suits and matching shoes—-a sure sign of an outer-borough boy. His developer father’s business was headquartered in a six-story red brick building in Brooklyn. Donald had business cards made up with the address of his East Side Manhattan apartment. “It was embarrassing,” he says in My Generation, now available as an e-book for the first time. “I couldn’t say I had a Brooklyn office and go out with a model.”