In this excerpt, the title and author name is followed by an "Introduction" briefly establishing the author's credentials and describing the book. Next comes a passage from the text, more information about the book, bibliographic details, and a link to the publisher's Web site.
If you're working under contract with a publisher, ensure you're authorized to distribute excerpts. Many authors are surprised to learn they don't have online rights to their work. If necessary, get written permission in an e-mail from your publisher's marketing department. Often publishers will provide a PDF for your use as an online excerpt.