I'm just starting my path into the CCNP, and I see a much MUCH larger library of books out there for this test than there were for the CCNA. What books are recommended if you are coming from the CCNA into the CCNP? I see there are self-study guides and exam guides from Cisco, but which should I use? Any recommendation would be appreciated. I also may go down the CCIP route instead, but the first test is the same in each I figure. Thanks.