The Art of Clint Langley

The Art of Clint Langley: Dark Visions from the Grim Worlds of Warhammer - Clint Langley, Nick Kyme his book contains beautiful color reproductions of some of the best art by Clint Langley. Combining illustrations from both the Warhammer Fantasy and Warhammer 40,000 game universes.
He has numerous paintings on covers in Black Library Books and on Combat Card Game.
Combining the paintings there are several commentaries by some of the book authors.
I think he can portrait the feeling that Warhammer 40k gives you...

One of my favourite book covers was portrait by him... Storm of Iron.
This book will give you almost no insight on the Warhammer or Warhammer 40k. But my the vivid images you can get the picture that the future does look grimm. Grimm, Dark and Hopelessness.