Most Inspirational Book?

Photo from Chicago Terrain Factory - Used without permission

Lately, I have been getting out my copy of Cities of Death and thumbing through it. I have found Cities of Death to be the most inspirational 40k book that I own. The photos of the model conversions and the terrain just captures my imagination. I can feel the environment and the strife in those photos. No other 40k game book fires me up like Cities of Death does.

It also helps that GW released their Cities of Death design notes as a free White Dwarf archive .pdf. Just click on Cities of Death

I am feeling hyped up right now to build some city terrain. Maybe a super huge factorum to play a Kill Team mission in?

What about you? What inspires your gaming? What lights a fire in your belly and makes you say, "I have to do that!".