I really liked the cover, basic but interesting. Opened it up, read the blurb. Sounded REALLY interesting. Very well written and has a mystery at the end which pretty much hooked me.
I wasn't so into the writing on the Look Inside, I have to say. It didn't seem very immediate, but then I'm generally a slow starter. As it was free I downloaded it (which I never do unless I fully intend to read it), had it not been I would definitely have given the look inside a good read.
Just thought it was an interesting experiment. Of the top ten free fantasy it was the only one for which the story wasn't completely obvious from the cover. I like that about a book, that element of mystery. Makes me think I need to re-do my covers. A good cover is half the battle won, although everyone likes different styles.
You may however run the risk of readers NOT buying a book simply because they don't understand what the author is offering.You did a look inside. Some will not. Many people like safety. It's the 'I know what I'm getting' feeling. Some may not want to risk the money whether its a little or a lot on something unfamiliar.
I like what you did. I did similar scans of covers and blurbs when researching my own, but I don't think as detailed as yours. What did you think worked best...simple covers or the detailed/busy ones? What about pictures versus those with no pictures but a sort of colored theme?
It's not my book, by the way, nor do I know the author. I hardly ever download any free stuff but since one of my stories was in the top ten of the free fantasy list I just decided to have a browse and choose the book that most appealed to me. This was it. I've started reading it - it needs an edit but its not bad. The cover and the blurb really sold it for me, though, and from how it made me feel I'm looking at my own stuff to see what can make it tighter and more visible.
As other posters have said, though, different people like different things. For me its about something that intrigues me, rather than some safe cover which pretty much tells me the book before I start to read. I hate to read the same story over and over again. Other people, however, might enjoy the comfort of knowing what they're going to get.