If you want to promote your book on Twitter, I suggest not tweeting about your book - or at least not very often. Here are two things you should do instead:
1. Tweet information that is useful to others.
I don't tweet a ton, but when I do, it's usually a link to a post I've written about book marketing or writing, or a link to an article I've read that I think will help other authors. The links to my own posts drive people to my website, where they can also learn all about my novels. This way I'm providing them information they find valuable, but I'm also getting my work in front of them without being pushy.
2. When someone begins to follow you, ask why.
Anytime I receive a notification that I have a new follower, I send that person a tweet of thanks and also ask why he or she decided to follow me. The response is usually one of two things. Either the person is an aspiring or published author who appreciates my suggestions on book marketing and writing, or she is a loyal fan of my novels. Once I know the answer, I can engage in a conversation with the follower. If it's someone who hasn't read my books, I send a link to the first chapter of the first book in the series and hope she will take a look. If it's a loyal reader, I send her a link to my fan page, which includes a list of easy ways to spread the word about my novels. (You'd be surprised how willing your fans are to help you if you just ask them.)
It's fine to promote your book now and again, but when all I see in a person's Twitter feed is an endless stream of BUY MY BOOK!, I immediately lose interest. You probably would too, right?
Maria Murnane is a paid CreateSpace contributor. She is the award-winning author of the romantic comedies Perfect on Paper, It's a Waverly Life, Honey on Your Mind, and Chocolate for Two. She also provides consulting services on book publishing and marketing. Learn more at www.mariamurnane.com.