You don't want a centralized study resource :)
The Cisco Press CCIE exam guide is a good place to start as a jump off point, but doesn't go into the depth necessary for the exam.
As a start, look at all the resources for the CCNP, CCIP and CCDP exams (except MPLS)
- Routing TCP/IP Volumes I and II
- Internet Routing Architectures
- OSPF Design Guide
- The config guides for the 3500 and 3700 series switches
Get that down, and you are well on the way.