There is another series of booklets out there that teach you how to make them - and they are a bit different from the obw books that most people get. I chose to go this route although I have yet to make my obw. I keep saying I need to get the fabric for it but haven't found *the one* for me to start with.
The series is Learn to be a Wacky....there is wedge, pinwheel and star by Linda Causee
http://www.amazon.com/s/ref=nb_sb_no...uiting&x=0&y=0
The wedge one is the one that would be similar to the obw books. It has the octagons in it.