What if achieving your professional dreams comes at too high a personal cost? That’s what screenwriter Patty Lin started to ask herself after years in the cutthroat TV industry. One minute she was a tourist, begging her way into the audience of “Late Night with David Letterman.” Just a few years later, she was an insider who --- through relentless hard work and sacrifice --- had earned a seat in the writers’ rooms of the hottest TV shows of all time. While writing for “Friends,” “Freaks and Geeks,” “Desperate Housewives” and “Breaking Bad,” Patty steeled herself against...