Regardless of its reputation as an OK shooter (though I quite liked KZ3), the Killzone series has always looked fantastic, and a new artbook out that celebrates this is a very good read. I got a copy of Killzone Visual Design yesterday, and while it ticks all the boxes of what makes a good video game art book — artist commentary, nice big images, clean design — one thing I particularly like about it is that it features quite a few examples of preliminary linework, which is one of my real game art fetishes.
Most art books tend to focus on final, polished and approved art, the kind of thing a publisher will use in a wallpaper dump, or tweet in promotion. Which is fine, that's often lovely, but Killzone Visual Design includes loads of very early vehicle and weapon sketches.
What's more, in keeping with the rough and early state of the sketches, they're printed like this:
Fine Art is a celebration of the work of video game artists, showcasing the best of both their professional and personal portfolios.