Regan McMahon, who took over as books editor at the San Francisco Chronicle when Oscar Villalon took a buyout, is now also take a buyout and leaving the paper. “When SF Weekly contacted McMahon Monday morning, she said people in the publishing world didn’t know about her imminent departure, and she feared that once they heard the news, they’d freak out. But she insists they shouldn’t worry — she’s been assured by higher-ups that the paper plans to name a new books editor and keep the section going.”SF Weekly