As of today, the newest camera guide book from White Knight Press, Photographer’s Guide to the Sony DSC-RX10 IV, is available for purchase in downloadable versions. You can get a bundle of all three electronic files (PDF, iPad, and Kindle) for $9.95 through this site, or, if you prefer, you can purchase the book in an individual format through one of the major online sellers, such as Amazon, iBooks, Google, Kobo, or Barnes and Noble Nook. For details, please see the book’s main information page at this site.