Marvel's started a new line of prose novels adapted from some of their recent, but classic, storylines. First up are "Civil War" and "Astonishing X-Men", with "New Avengers" coming in early 2013. These are attractive hardcovers, a little wider than standard and on bright white paper. (They'll be issued as paperbacks later too.) Since these are based on comics you've probably already read, there are spoilers below.
I'm a big fan of novels based on comic characters: I have a collection of them going back to the 1970's. And these are good books, probably among the better written in that collection. But I'm disappointed that Marvel chose to do adaptations instead of original novels. There's a long history of adaptations, and I think DC was still doing them as recently as "52", but that dates from a time when "respectable" grown-ups wouldn't pick up a comic book. In 2012-2013, it's hard to imagine anyone who's interested enough to read "Civil War" who wouldn't just pick up the graphic novel. (Or a fan of the "Avengers" movie who wouldn't want to read what Joss Whedon wrote instead of something once removed from it.) Still, these are well done (and I appreciate the effort that went into them), and if you do know somebody who likes this kind of thing, this is the kind of thing they'll like.