Simon Mayo's Book Review podcast on 23 April reviewed Gone Tomorrow by Lee Child. The reviewers were joined by Lee and he dropped a few nuggets of info:
Though he is careful not to describe his main character Jack Reacher (other than large and invulnerable) in the books his mental image of Reacher is rugby star, Lawrence Dallaglio (pictured below).
One of the books has been scripted and there's the possibility of a film in the next couple of years.
One of the actors that keeps being linked with Reacher is Hugh Jackman:
One of the next two or three books will revisit Reacher's past in the same way as The Enemy did.
The only other person he could think of who wrote a series with some books in 3rd person and some in 1st was Barbara Kingsolver.
The current Book Review podcast (covering The Secret Speech by Tom Rob Smith and Heartland by Anthony Cartwright, with Joel Morris, Boyd Hilton and Stella Duffy) can be listened to or downloaded at the BBC website. It's possible that earlier editions can be retrieved via iTunes (or similar)...