From the description in the book Ring that Bind, it sounds similar to the technique shown by Pam Bono in her book(which is no longer in print either but can be found Amazon Used Booksvery reasonably)"A Quilter's Life in Patchwork". She shows a wedding ring quilt that the ring is done in rectangles strip sets and right triangles instead of curved piecing in the traditional manner.
One thing to mention about Pam's book, some of the books listed on Amazon say they come with the cd that comes with the book. Because the book has been out of print for so long, the cd is no longer supported by her website and will not work. I'm not sure what was on the cd but the book has the full set of instructions for every quilt shown in the book. The cd must have had something extra on it that is not shown in the book. I purchased the book for about $15 not knowing that the cd didn't work but there are other copies that are missing the cd and sell for alot less. I wish I had known!
Pm me if you want more info. Chris