Fstoppers wrote an article about one of Tony Northrup's ebooks being available for a limited time: How to Create Stunning Digital Photography. Within the following link is another link that allows you to choose the file format you'd like to save. Fstoppers says it is Amazon's second best selling photograph book.
https://fstoppers.com/education/ama...raphy-book-now-available-free-download-270749
https://fstoppers.com/education/ama...raphy-book-now-available-free-download-270749