As of today, Photographer’s Guide to the Sony DSC-RX100 III is available in all three downloadable versions: PDF, ePub (for iPad, iPhone, Kobo, Sony, Nook, etc.), and mobi (for Kindle). You can purchase a bundle of all three versions through this site for $9.95 using the above link.
The book will be available in paperback for $26.95 through Amazon.com and other online sellers by the end of August or early September 2014. I will post further details as they become available.
Please note: If you purchased the PDF-only version of the Sony RX100 III book through this site, you should have received a message providing links to the iPad and Kindle versions. If you did not receive that message, please send a message to firstname.lastname@example.org making reference to your order number, and I will send you the other two versions.