Although there was nothing earth shattering about Master of Crows, it's definitely a very enjoyable read. Silhara and Martise are both compelling characters, and in fact, I'd say the characterization is the book's strongest suit. They're both well developed - not perfect, but also admirable in their own ways. The romance between the characters is also convincing, and very passionate. There were a lot of sensual scenes, which I thought were well-written and quite steamy, although the author severely over-used the word "cunnus" throughout these moments.
I can't bring myself to give it 4 stars, since I don't think I'd ever read it again. This book is enjoyable but not necessarily memorable, and perhaps a little bit predictable.
However, the book is definitely more than worth its $2.99 price-tag. It's interesting, compelling, and well-written enough to be worth double that, so you really can't go wrong by picking this one up. It'll definitely give you a few nights of entertainment.