Doom III
DOOM 3: RoE with Bonus!
I have noticed that if you preorder the XP at GameStop, you will receive a DOOM 3 Poster and a small figurine in the image of the Baron of Hell -- for free. If this offer catches your interest, find it more about it over here: DOOM 3: RoE Expansion Pack with Bonus! ($35)
Doom III
DOOM 3: Prima Official Game Guide
AussieXbox reports that it will released next month. The 240-page book will include detailed information about the monsters and presents tactics to defeat them, specs for all weapons and finally a walkthru to help you find your way through all 27 levels of the game. - Extensive PDA Appendix to guide you to the information you need to get through the game....