If you want something "low weight" (read "won't make you think very much) you might try some of the Jack Reacher books. I almost hate to mention them in a Dresden forum - they don't even come close - but I found them fairly entertaining in an "escapist" sort of way for a couple of months 2-3 years ago.
I have a friend who absolutely despises them because, according to him, the firearms information is all wrong. I don't know firearms that well - it was fine for me. Anyway, Reacher is almost a less realistic character than Dresden, even given Dresden's magic. But I had fun.