You may have seen this tutorial on Konstantin's newsletter. I decided to post the link here so it is easy for people to find it.

Boston Braid Bookmark tutorial:
http://www.quiltingboard.com/resources/article-124.html

You can sign up for the Quilted Paradise Newsletter here if you haven't already:
http://www.quiltedparadise.com/

Hope you enjoy making these!

thanks!