ISBNs: Why, Where, and When Do You Use Them?

When I self-published my first book in 2015, I researched ISBNs. I knew the book required one, but I wasn’t sure where to buy and why it was needed. I guessed it related to sales and marketing, but I was a little off the mark. So, if you’re curious about when and why you need an ISBN for your book, read on. You’ve probably noticed the ISBN bar code on almost any book you purchase. It looks...