Andy probably knows the most about this, but you still might fair better to call the school directly. Schools often change their texts (either to newer editions or completely different books) in between years.
As we all know that the required text may change from year to year due to new editions or a change of new course director. But for the following frist year courses and books at Nova, I know for fact that it will not change and are required are:
All other courses' required texts are not required to purchase if you don't want, especially basic science courses. For basic science courses, you'll receive thorough handouts every lecture. Usually, the motto is, dental classes = buy books, basic science classes = don't buy books.
Of course, if you wish to buy books, then by all means, go for it. I purchased pretty much all recommended and required books.
My personal highly recommended books for first year dental school are:
Above and beyond purchasing textbooks, if you want and ambious enough, which I highly suggest is to purchase the 2004 Dental Decks now and start to familiarize yourself with the dental lingual (mesial, distal, etc) with the Dental Anatomy flashcards. Besides, you'll be using the 2004 edition dental decks for NBDE Part 1 when you take it anyways.
Alright, this should be enough for you to consider.