If I were a just-starting-out photographer, I'm sure I would give this ebook 4 stars; there's enough good information here on the eight "core knowledges," ranging from composition to making money, to at the very least let a neophyte know what he or she needs to learn more about. As one reviewer said of the book at Amazon (where I got it free during a special offer), it's pretty good for beginners, but it should be marketed to that audience.
Although I've sold a few photos and earned honors for my work, I'm not even close to being a professional. Still, with the exception of an exposure lock button I didn't know exists, I really didn't learn much here except that the author - a professional herself who's written four ebooks on photography - takes absolutely gorgeous photographs that display beautifully on my Kindle. And if you don't have (or don't want or can't afford) a DSLR camera, a good bit of what's included won't be of much help.
The best advice, from my perspective at least, was in the final section on making money. It's important, the author says, to find a decent website at which you can display your work. I agree that Redbubble.com is a great choice among all the free storage possibilities - I've been an active member for some time now. My primary gallery is at Zenfolio.com, another site she mentions, but it comes with an annual fee. Some of her other suggestions for ways to market photos are worth trying as well.
I do have a couple of issues with the advice to upload photos around 1,000 pixels on the longest side to reduce the chance that your photos will be ripped off by those who ignore copyright laws. First, that's too small to be of value at several of the photo websites, including Redbubble, which asks members to upload large files for a good reason. Unless all you care about selling is greeting cards, you'll need to comply.
Conversely, 1,000 pixels is too large for social media like Facebook, where theft tends to be rather common. A downloaded photo of that size can make a serviceable 5 by 7 print at the very least - certainly big enough to frame for hanging in a photo thief's living room. For these sites, I resize all uploads to 500 pixels or less; the best anyone will get out of that is a slightly fuzzy 4 x 6 print.