The art is good. There are many detailed artwork of the characters, storyboards, props, weapons and environments. The layout is nice, the images are large and clear. There are also comments creators.
Garrett is the main character so it has the opportunity to see in detail: his face, his clothes, his bow and different types of arrows and its movements. The other characters are also well covered.
Most environments artworks are drawn or rendered in very high resolution, and then reduced for publication, so they are very detailed. A lot seems to be the digital painting on 3D models, but they are exceptionally well made so as to capture light and atmosphere.
The main thing to know about this artbook is that the universe is very dark, which reminds me of the game Dark Souls. Everything seems sinister. The color palette is composed mainly of black, blue and some brown. It's always cloudy, foggy. The city is constantly shrouded in darkness. There is a lovely artistic work done on the atmosphere.
Overall it's a pretty good artbook, just as the overall gloom may or may not be to your liking.
(You can find more images of the book on my blog. Visit my profile Amazon to follow the link.)