As book writers, we are always looking for ways to get the word out about our books, but I find that writers often overlook the possibility of having book excerpts published in magazines. Not all books will lend themselves to such use, but many do. If chapters of the book don’t stand on their own, you may have to do some editing. Excerpts must stay within the length requirements for the particular publication.
Always select a chapter that is on a topic the publication is interested in. Since most guidelines don’t mention excerpts specifically, it’s usually best to query. They will want it in manuscript form—not a copy of the finished book form. It’s not as important what you get paid for the excerpt as it is what kind of exposure your book will receive.
You will find a list of publications that accept book excerpts in the Topical Listing for periodicals in the market guide.