As the author perhaps it is unusual for me to comment on my own book, but I can provide some useful insight concerning the two forms of the book. I like the Kindle edition a little better because I chose color photographs for the book believing that they would be published in color, but the paperback and hardback versions printed the photos in black and white, which mostly failed to provide the vibrant colors that make the photographs extraordinary. The Kindle version, with the back-lighting, showcases the photographs as they ought to be displayed. Other than that, the two versions of the book are identical, except for price of course.