There are a lot of good books out there, and many of them cater to your specific needs. I read a lot of posts here by people asking "which book is the best?" or questions along similar lines. The simplest answer is whatever works for you!
Probably the best advice is to go to a book store, pull several books off the shelf, take a seat and start looking through them. I had many people recommend books like saunders or mosby's, but when I looked at those books I felt like I was reading a dictionary. Great reference book, but totally unstimulating, and I'd probably study less because of it. In order for your studies to be successful they have to be stimulating.
Speaking of excellent books, I just picked up "NCLEX-PN Made Incredibly Easy" - The title threw me off because I thought it wasn't going to be detailed enough, but it's very thorough and the layout doesn't bore me to death.
I'd also like to add that I returned my Exam Cram NCLEX book. I'd definitely discourage people from it. There's numerous spelling
errors, but worse than that is I found a lot of misinformation in it. The book completely
confused Angiotensin Converting Enzyme inhibitors, for example. And later suggests that the thyroid produces thyroid stimulating hormone. Just a few examples of the errors that I can't afford to be unclear on. Also, the rationale for the answers in the Q&A section sucks.