Hi,
Good on you for persuing what is seen as one of the top Certifications one could hope to achieve.
The ISC2 Official study guide is a solid place to start, and the 11th Hour CISSP by Eric Conrad was well favoured by a few candidates on the course I sat.
Most books by Shon Harris or indeed any that he appears as co-author on seem to be quite popular also.
In terms of a "condensed" and overview-style revision resource I would recomment the Sunflower pdf readily available online.
The above, coupled with enough (relevant) experience in Information and IT security will set you up perfectly to tackle what is widely recognised as one of the hardest exams to get through. (I hasten to add, not THE hardest by any strecth of the imagination, but certainly hard).
Happy trails!
