Book publishers choose from an assortment of fonts when printing a book. Some publishers create their own proprietary fonts, while others use licensed fonts. Some of the most popular fonts for books include Garamond and Janson.
Book publishers choose fonts for readability. According to the Huffington Post, serif fonts provide an easier reading experience than most fonts. For this reason, many book publishers choose classic fonts, such as Baskerville and Bembo. Of course, nothing prevents book publishers from using new or outlandish fonts. Some authors choose a handwritten font for journal entries and personal thoughts, while others rely on specific fonts to convey a particular attitude throughout the text.