For those so inclined, a monthly or quarterly newsletter (digital or print) can do wonders when it comes to increasing your book's visibility and your notoriety as an author.
Though it sounds like a complicated affair, if you blog regularly without any problems, starting a newsletter won't be a problem either. With companies like Constant Contact, the templates are already designed for you. With just a few clicks of the mouse, you can add a subscribe button to your blog, website or both. Basically, all the hard work is done for you. All you have to do is plug in some words, graphics and ordering information and click send.
Serious authors who plan to write multiple books or who already have multiple books on the market should consider this a necessity for higher book sales.