The Merck manual is a bookshelf must for all medical or biomedical science students, and for all members of the healthcare team.
A text which at first glance appears limited purely by its lack of size, do not be fooled. The pages are extremely thin and there are nearly 3000 of them, packed with information in a well presented, accessible form.
Well worth its small cost, this world-famous text will act as a dictionary, textbook and study reference guide all in one, covering the simplest to the most uncommon of symptoms and illnesses.
An excellent investment which I have used in EVERY assignment including my dissertation so far in my Biomedical Science degree, of which I am in my final year. I can attribute a great number of my marks to this essential text.