Several years ago I learned to publish knitting patterns in e-book format. I offer several pattern books (some for free) on
Smashwords: https://www.smashwords.com/profile/view/kschimmelwriter
You can also publish at Smashwords. It costs nothing to set things up, and Mark Coker of Smashwords has a great free guide (in e-book format, of course) to lead you through the process. If you write craft patterns, poetry, or the next big novel, you can self-publish.
BTW, the pattern for the Duplicate Stitch Tree Scarf pictured is available in a variety of formats, including printable pdf, at:
https://www.smashwords.com/books/view/397438
Let me know if any of you have published patterns. I'd love to check them out!