This is one of the best drawing books I have seen. It is the closest possible to attending the drawing course of the authors without physically being there. With a good set of introductory theory chapters and the full scope of proposed exercises with detailed instructions and many examples, it is inspiring and creative, making you want to keep drawing and drawing and drawing. Along the book there are also several interviews with established artists of different styles which are very informative and inspiring.
I definitely recommend this book to anyone interested in drawing and improving their skills. ( )