The ebook is available on:
The print version is available on:
Note: If you bought the ebook from Amazon be sure to go to Manage My Settings on your ereader to update the file. (I addressed some typographical errors. The update should be sent out any hour now. This does not affect the print or Barnes and Nobles ebook.)
Also, if you are outside North America you will still be able to purchase the ebook at any of Amazon’s sites.