If you are publishing your book yourself in print format, you'll need to decide what publishing company to use.
This article by Karen Myers on the Alliance of Independent Authors website explains why some authors use two companies–CreateSpace for books sold on Amazon and Ingram Spark for other distribution outlets, such as Barnes and Noble.
Right now, paperback editions of my Awakening supernatural thriller series are published only through CreateSpace, but I'm thinking of adding Ingram Spark, as it appears from Myers' article that bookstores will be more likely to carry the books. Note that you need to use your own ISBN (the number that identifies your book) with Ingram Spark, so you will spend a little more.
Until Sunday, when I'll share some tips on book fairs.