Think about your favorite book for a moment. How did it make you feel when you read it? Is that part of what made it such a compelling story?
My favorite book series is Harry Potter, and apart from the awesomeness that is a magical boarding school, the font in which it was published may have influenced my affection for the series.
You see, visual elements are just as important as the words on a web page or blog post. And fonts serve as a visual marketing tool for publishers to leverage when compiling their story. The font you choose ultimately plays a hand in conveying the message you want to send your readers.