I'm preparing for the CCIE SP written exam. Is there an actual certification guide for this exam? I've looked in a number of places and can't find one. I realize I'll need more resources for the lab, but was hoping I could get one comprehensive resource for the written. I have one for R&S and I think they exist for security and voice. The SP track overall seems to be neglected in terms of equivalent materials compared to the rest.
If this doesn't exist, what materials from the book list would you recommend? I don't want to have to buy 50 books to pass one written exam.