This was recently posted by a reviewer whose blog I follow. She doesn't review the sort of books I write, and that's a good thing. I'll never be tempted to ask--she does review books I like, to some extent, and has a lot of cool things to say, just in general. I'm posting her review policy here, because I like it. I'm not sure I'd always LOVE it, but she strives to be fair and is pretty up front about it.
Things Authors Should Know About Bad Reviews
The True Confessions of a Book Reviewer
Friends of mine have heard me say things like--fair's only fair to the winner, or fair is subjective. It all depends on what your basis for comparison is. So, if you, as a writer, want a review, you have to ask yourself this one question:
It's okay to have an opinion or criticism. It's helpful if you use your opinion or criticism constructively.
That is all.