Thanks to Nick Daws of the Entrepreneur Writer for bringing this new Kindle marketing tool to my attention.

Amazon has introduced a new feature to help authors generate book sales from their websites and social media activities. A Kindle Instant Book Preview can be embedded into a webpage using HTML or shared as a link via email, text and social media. This enables readers to preview a book (in a similar way to the ‘Look Inside’ feature found on Amazon product pages) with only one click and without leaving the webpage they are currently browsing.

Try clicking on the book cover image below left and you’ll see what I mean.

If the reader likes what he sees there is a direct link to purchase the book from Amazon. A Kindle Instant Book Preview retains traffic on an author’s website because books can be viewed without diverting your website visitor to Amazon.
To obtain the Preview link, search for the book on Amazon.com (not UK), click the ‘Embed’ link on the right next to the other sharing options, copy the URL or embed the HTML code onto your website.
N.B. It's not possible to embed the HTML into a sally-jenkins.com/ site (like this one) because sally-jenkins.com/ doesn't allow certain HTML codes such as 'iframe'. So I've displayed the book cover image with the Preview link behind it.

Full details can be found at http://www.amazon.com/b?ie=UTF8&node=13489836011&tag=viglink20273-20

If you’d like to read more on Nick’s original post, you’ll find it here.