Chris Anderson, the Editor of Wired US, is currently pushing his book Free which is all about the free price point in the modern economy. This picks up on, in part, the freemium model I spoke about recently.
Of course it is difficult to argue that free is the new price point when you are trying to sell a book with a cover price of £18.99. To get around this difficulty Anderson has managed to persuade his publisher that they should give away a limited number of copies of the book in various formats. So right now the book is available as an eBook, audio book and even an abridged paperback. All of these are only available for a limited period of time after which you will need to buy Free if you want to find out about free.
The ebook is available in both pdf and epub formats which means you can read it on your iPhone using the wonderful Stanza. Anyway head on over to This Book is Free for your (free) copy.