What if a company paid to have their product placed inside the story line of a book?
If this idea leaves a bad taste in your mouth, you may find it ironic that this idea has been done and the company that did the sponsoring was Sweet 'N Low. The book is titled Find Me I'm Yours and the previously mentioned sugar substitute has been worked into the story line in several places.
The book is tied in with a series of websites. A small alternative media universe has been created to go along with the book. NYT article with additional details - E-Book Mingles Love and Product Placement