The History Faculty Library is not housed with the rest of the Faculty in the George Street building, but can be found in the Radcliffe Camera as part of the Bodleian Library.
The Faculty Library is extremely well stocked, and in it you will find lending copies of most of the books that you need; and for more specialist works, you are free to make use of the Bodleian, with its six million volumes one of the major research libraries of the world. It is also possible to make use of other of the more specialist libraries around the University.
For more information about the History Faculty Library:
Website: http://www.bodleian.ox.ac.uk/history
Email: library.history@bodleian.ox.ac.uk