It's called Intermediate Photography and you can buy it for Kindle (or compatible device) by clicking here.
Nothing in it will be surprising to regular readers of this blog, but I do expand on some things and clarify others, and I bring in a bunch of material from these 19th century books on composition and painting I've been reading. It's essentially a book about composition for photographers.
There are not very many pictures in it. It's short, novella length. There is one color picture, so if your eBook reader isn't color, that example will be pretty much lost on you.
I don't expect it to sell well. To put it mildly. But by golly it's out there, so now there's no excuse for all the crummy rule of thirds golden triangle rubbish!