The first step toward reaching internetworking mastery is to build a solid foundation of knowledge. For all CCIE candidates, this means hitting the books, and hitting them hard. To help you sort through the plethora of printed resources available, we have compiled a list of recommended books for CCIE candidates. We recommend starting with vendor-independent resources before moving on to implementation-specific information.
CCIE Routing & Switching: Vendor Independent
CCIE Routing & Switching: Cisco Press
CCIE Service Provider