While there are lots of good posts/tutes about doing the OBW, none of them are comprehensive. All of us who have made OBW's are happy to help and give advice to someone who has the book but is still struggling with a specific aspect. . But giving someone what is essentially the contents of the whole book is not only unfair, it is a violation of copyright law.
There is more to the process than just cutting strips and sewing pieces together. How you choose your repeats, how to align and pin and cut, and then how to construct the block is much more involved than a regular pieced block like a log cabin for example. It really is a complex process, but not necessarily a very difficult one.
So, whether you buy a used copy or a new one, please buy the book before you ask for advice. It's the right thing to do. Then you will get all the help you need.