The three books I use as text books

1. Proteins-structure and function (2005) David Whitfold
Amazon book info http://0rz.net/461es

2. Biochemistry (2004) Donald Voet & Judith G. Voet
Amazon book info http://0rz.net/3d1ds

3. Structure and Mechanism in protein science (1998) Alan Fersht
Amazon book info http://0rz.net/8c1fN