I checked this book out from the Library a couple of weeks ago and found it interesting. I've been wanting to get more practice on drawing the head so that I may one day not have to grid my canvas.
Artist William Maughan does a wonderful job in explaining his technique in this book. You only need two CarbOthello pencils and Velvet Grey canson paper. The paper will become your medium fleshtone of the figure. I highly recommend this book!
I will post pictures of my drawings as I study his technique.