If you want to get an insight into the minds of the authors of the CCDE Lab exam, the following digital ebook is a must read: CCDE Quick Reference

Although it is officially only for the CCDE written preparation, we highly recommend it to read through it prior to the practical exam as well. It’s concise, down to the point and especially the Routed Design Theory and the Topology Design Theory are very important in relation to the CCDE Practical Exam as well.

CCDE Recommended Reading

We have received quite a few emails recently on which books should be read or at least flown through before coming on our practical CCDE Bootcamp.

We have compiled a list of recommended books (from Cisco) for both the CCDE Written Qualification as well as the CCDE Practical Lab Exams:
http://www.ccdebootcamp.com/ccde-recommended-books-list.html 

Out of All the Books mentioned there, we HIGHLY recommend the following ones:

Book 1:
Campus Network Design Fundamentals

Book 2:
Comparing, Designing, and Deploying VPNs

Book 3:
Optimal Routing Design (A MUST READ)

Book 4:
Network Management Fundamentals

Book 5:
Data Center Fundamentals

Book 6:
Definitive MPLS Network Designs (A MUST READ)

In addition to that, we recommend the following from Cisco’s website:
http://www.cisco.com/en/US/netsol/ns742/networking_solutions_program_category_home.html
http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/routed-ex.html 
http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book.html

Also we recommend going through the offical RFCs:
http://www.ietf.org/rfc/rfc2328.txt 
http://www.ietf.org/rfc/rfc793.txt 
http://www.ietf.org/rfc/rfc2784.txt 
http://www.ietf.org/rfc/rfc2547.txt 
http://www.ietf.org/rfc/rfc1771.txt 
http://www.ietf.org/rfc/rfc1195.txt 
http://www.ietf.org/rfc/rfc2474.txt 
http://www.ietf.org/rfc/rfc1112.txt