As a self published author you want to be able to share with your fans more than just your book. And custom print bookmarks allow you to share a bit of the book with your fans and they also make for great advertisements. If a friend or family member sees the new bookmark and wants to know where to get one, they have no choice but to come to you.
Bookmarks can help you interact with your fans on a more personal level and act as free advertisements for your book. If you haven’t looked into the bookmark area, I highly recommend you doing so. It’s great easy, and affordable way to promote your book and interact with fans.