Two of the largest book publishers, HarperCollins and Random House, make their books freely available. They have made digital versions of their books, which can be searched and even be placed on weblogs. They hope to sell more books with this strategy.
I think this is a good attempt, because consumers value the discovery of new digital products. By making books fully available on the Internet, consumers can search through books and discover books of their interest previously unknown to them. Brynjofsson (2003) argues that discovering previously hard to find products increases consumer welfare. Maybe the next step they can make is combining books to new digital products.