Metasploit - the penetration tester's guide
Practical Packet analysys
I'm currently reading :
The Web Applicatino Hacker's handbook
I'm also extending the lab for 90 days.
This trip is going to take much longer than I anticipated, mostly because of the huge workload of learning stuff on your own, you guys have to admit, the OSCP is all about the lab, it has less to do with learning from the videos and the pdf's. I see them more as a 'practical example' of theoretical stuff you have to learn on yourself. I wish I knew it before so I could have digged the books before I took the OSCP plunge. For that I would say their text what you should know before the OSCP is kind off misleading.
That might explain why almost nobody passes the test the first time.