Just discovered them myself. Totally intrigued!! My guild had a LQS owner to do a program and to teach a class on One Block Wonders. We used the book "One Block Wonders by Maxine Rosenthal". I had made a Stack and Whack by Bethanny Reynolds in the past and IMHO it was more complicated to make than the OBW. Stack and whack has a lot of points to be matched making star shapes and the OBW uses hexagons or octogons being sewn with straight lines and is way more forgiving of slight imperfections.
There are a lot of discussions (threads) here on the forum about OBW, do a search and check out all the ones made by members here. Spectacular!
And this gentleman......check out his OBWs and his story.
https://bruceseeds.com/