Self-publishing an e-book is relatively quick and easy nowadays, which is why so many authors are taking that route. If you’re one of them, you might want to read this article:
This excerpt from the article will give you a good idea of what it’s about:
When it comes to publishing a digital book yourself, there are a myriad of daunting barriers. How exactly do you formulate a proper table of contents? How do you convert your book from Word to EPUB or to a Kindle friendly format? What is the industry standard for line spacing, font types or margins? What is the average cover art size for Apple iBooks, or Barnes and Noble? Aside from just writing your book, you could spend months formatting it correctly to self-publish, if you never had to do it before. Not willing to learn, or to cut corners is prompting predatory behavior from publishing companies, vanity presses and unscrupulous review companies.