Raylan by Elmore Leonard.
Mark told himself that Elmore's last books weren't up to his usual standard. "You want to know", Barbara said, "does Elmore still have it or not?" Wanting him to get to it. "He might", Mark said, "or he might not".
Looking at her over his glasses.
What Mark did the next morning, he picked the book up. Got to it. Mark liked it, but thinking Stick, LaBrava and Rum Punch had more snap.