As of today, Photographer’s Guide to the Panasonic Lumix LX7 is available in downloadable versions specifically formatted for the Amazon Kindle readers and for the Apple iPad, iPhone, and iPod Touch, as well as for Barnes and Noble Nook devices, among others.
You can purchase all three downloadable versions (PDF, Kindle mobi, and ePub) for the single price of $9.95 through this site, at the information page for the LX7 book. The book will also be available for sale in the Kindle version at Amazon.com in the very near future, and it will be available through the iBookstore for the iPad and other Apple devices within the next two weeks. It will be available for the Barnes and Noble Nook reader in the near future, also.