Christopher Hitchens has begun canceling in-person events, from Raleigh to San Jose to Los Angeles to Seattle to Portland, regularly citing 'personal reasons.' | Photo by AP Photo Close

As soon as Christopher Hitchens' memoir, "Hitch-22," hit bookstores, the Vanity Fair writer was just about everywhere promoting it: "The Daily Show," "Real Time," C-SPAN, "Hardball," the BBC and so on.

Over the past few weeks, however, Hitchens has begun canceling in-person events, from Raleigh to San Jose to Los Angeles to Seattle to Portland, regularly citing "personal reasons."

A spokesman for Twelve books, which published "Hitch-22," tells POLITICO that, "Unfortunately travel is impossible right now for personal reasons, but obviously Christopher is eager to get back on the circuit and will be doing so soon."

A poster on the website Reddit.com wrote that Hitchens was spotted leaving a plane on a stretcher. I've written Twelve Books regarding that rumor and will update this post when I hear back.