|First wife of John Collier, Marian Huxley, also a painter|
Posted in this article is a link for two books you can download absolutely free. The books are both written by a fantastic painter of the past, John Collier. John Collier was an Englishman who painted in a Pre-Raphaelite style. He was a leading portraitist of his generation.
Check out an article about Collier and his sight-size method, posted by Darren Rousar, with some samples of Collier's work here. Collier really knew what he was doing so having these books will be a valuable resource for any realist painter.
Download A Manual of Oil Painting and The Art of Portrait Painting