About the books
Electronic structure is a many-body interacting-electron problem, one of the grand challenges of physics. The field needs two books. DFT is a method to treat certain properties of the interacting system; the theorems and methods are so easy to understand and approximations are so useful that it deserves to be explained in a form that does not require the reader to be an expert in many-body theory. Many-body methods that go beyond DFT are so important conceptually and are becoming so useful in practice that they deserve to be explained in a form that does not require the reader to be an expert in the nuances of DFT and the details of the methods for DFT calculations. A unified presentation of the two books, and the different approaches within each book, is what sets this work apart from all the other works in the field.