Good advice from the person above, and I would completely agree. However...
The main one for Adult Nursing Students that I am aware of, is The Royal Marsden Hospital Manual of Clinical Nursing Procedures (2011). I have the Child branch equivalent written by Great Ormond Street and it's useful, and it will last beyond when I qualify. As for anything else, wait until your university can recommend any. Their library will have lots of the books - and any you really like you can then go and buy yourself as I have done.
For this one book, it's potentially a good idea to buy now, as the prices of books go up in September time, when retailers know there's loads of new university students in need of text books.
Hope that helps
Joel