Common questions about ISBNs and Blurb books What is an ISBN? Do I need an ISBN for my Blurb book? Does Blurb provide free ISBNs? Where will the Blurb-provided ISBN appear on my book? Can I customize where my ISBN appears on the book? How do I use my own ISBN? Why can't I remove the ISBN from my book? Last updated: August 23, 2020 20:43