In 2006, Matthew Specktor moved into a crumbling Los Angeles apartment opposite the one in which F. Scott Fitzgerald spent the last moments of his life. Fitz had been Specktor's first literary idol, someone whose own passage through Hollywood had, allegedly, broken him. Freshly divorced, professionally flailing, and reeling from his mother's cancer diagnosis, Specktor was feeling unmoored. But rather than giving in or "cracking up," he embarked...