I just finished “Agency,” William Gibson’s latest, 10 days or so ago and the ending still resonates in my imagination. Well worth the meticulous and fascinating buildup. It’s a worthy sequel to “The Peripheral,” and, like that novel, very much about the present day, however richly the future/alternative worlds are imagined. I reviewed “The Peripheral” back in the day. I’m pleased to see much of it holds up for “Agency” too.