For a short time over the past day or two, there was a problem with the system for ordering the new guide book for the Sony RX100 IV camera. Because of a mistake in updating this website, customers who tried to purchase the bundle of the PDF and two other downloadable versions of the book were directed to the site for a particular seller that sells only one downloadable version of the book. The problem was fixed early on September 13 after a customer brought it to my attention. If you experienced this problem, please send a message to contact@whiteknightpress.com with the details, and we will get the proper files sent to you.

Please note, though, that I will be out of the office for a few days for a medical procedure starting on September 14, so it may take several days for you to receive a full response.

— Alex White