No Resident Evil collection is complete without BradyGames' Resident Evil Archives books. There are two volumes, each brimming with 300+ pages of concept art, lore, and character information from throughout the Resident Evil series.
Volume 1: http://www.amazon.com/Resident-Evil-Archives-BradyGames/dp/0744006554/
Includes:
Concept art from the complete series.
In-depth explanation of the relationships between characters.
Coverage of locations and more from both movies and all games.
Volume 2: http://www.amazon.com/Resident-Evil-Archives-Volume-2/dp/0744013216/
Includes:
-Coverage of characters, bosses, enemies and an explanation of the storyline from 2002 through 2009.
-Concept art from Resident Evil 4 and 5 as well as all the expansions
-Detailed "connection" information explaining the interrelations between characters, locations, etc. from all of the games, movies, and more.