By reading excerpts from your book, you create an online rapport with your readers and anticipation of what's to come. (thebookmarketingnetwork.com)
There is also a 10 page PDF file on the site with excerpts from the book. (bitesiprepeat.com)
Some will ask for guest posts; some will ask for excerpts from the book to share; some will submit interview questions to be answered by the author. (editionguard.com)