Google just announced an exciting new feature — embedded previews:

“We’re launching a set of free tools that allow retailers, publishers, and anyone with a web site to embed books from the Google Book Search index. We are also providing new ways for these sites to display full-text search results from Book Search, and even integrate with social features such as ratings, reviews, and readers’ book collections. By providing tools that help sites connect readers with books in new and interesting ways, we hope publishers and authors will find even wider audiences for their works”

Hat tip to ReadWriteWeb