I bought book 2 by Maxine Rosenthal. Book two is an evolution of book 1 and you can figure out book three on your own simply by limiting your fabric choices. I've seen you tube videos on how to do it and tried a OBW before with a waaaay too busy fabric. I needed about 10 yards to get something close to good transitions. This time I'm using OBW as background and completing with LOTS of cubes. This quilt will have about 50 different fabrics in it when I'm done. I've cut enough trapezoids to make a second quilt. I have found that the most important information in the book is pressing the seams open. The bias cuts seem to true up better when pressing open rather than only to the dark.