Plenty of people will be commenting on Parker's passing, and I'm no different. I'm one of those who sort-of, kind-of quit reading him, but only a year or so back, so I've read most of his books. I enjoyed all of those I read and think I probably laughed out loud at least once in reading each one of them. I discovered Parker's work when the first paperback edition of THE GODWULF MANUSCRIPT came out. I was working in the book department of a department store in downtown Fort Worth, and we carried it. I was already a big fan of Hammett, Chandler, Ross Macdonald, and many other private eye writers, and when I read THE GODWULF MANUSCRIPT, I knew it was the real stuff. I think we're only beginning to appreciate just what a huge influence Parker's work was on the genre.
There are some stand-alone novels of his I never got around to reading. I really need to.