Congrats on getting into the program. I just graduated and can give you the following advice regarding books:
1. Agree with above post - you'll do much better buying them online Amazon and Half.com are great sites.
2. Don't buy EVERYTHING on the books list. You'll need all the text books but can get away with not having many of the other books, like the workbooks (although they can be a good study tool, just depends on how you learn) You can also spread out your purchases... They'll tell you to buy ALL your books at the begining of the program, but you won't really need the Pharm, Maternity, Psych or Peds book in you're first semester... The only reason they have people buy EVERYTHING is to keep everyone together in case a newer edition becomes available...
3. Speaking of Edition #'s you can save big $$ buy using an earlier edition. Example they are using the 8th edition of the Lewis and Heitkemper book but you can probably get the 7th edition for around $10.00 on Half.com - The page numbers won't match what's on the sylibus but the content between editions doesn't change much - Simply borrow a friends "NEW" book and make sure you're reading the same content - I used previous editions for Peds, Maternity and Pharm and had NO trouble.
Do the reading, work hard during clinicals and utilize the available resources and you'll be fine.
Best of Luck!