The Vampire: The Requiem core book was published by White Wolf for Vampire: the Requiem.
Credits: A whole mess of stuff. Part of the culture and tradition info, part of the religion info, the Daeva, the Nosferatu, the Invictus, the Lancea Sanctum, several of the Disciplines, and half the New Orleans appendix.
Notes: I was one of the three primary writers on this (not counting the fact that Justin Achilli, the developer, also wrote a goodly amount of it). This is, quite possibly, one of the most major projects I’ve worked on since I got into this industry. Regardless of how people react–and I think it’ll be positive overall–I’m honored to have been a part of it.