For me, it's always easier to review a good book (this is great! you shd rush out and buy it!) or a bad book (stay away from this one, folks) than a so-so book (not terrible, not great; pick it up if you're particularly interested in its subject, otherwise check out a library copy). This particular book fell mostly in this third category. I'm also more self-conscious of what I write just now, since I recently discovered there's an 'Open Letter' posted on the website of one author whose work I reviewed last year, protesting against my incompetence and malice. I don't think I'm either, actually; I just happened not to think much of his book, and said so, and explained why, as clearly as I cd. I'm not surprised he's annoyed, though; no one likes a negative review.
Having just been asked to write yet another review, this time a much shorter one of a book I'm predisposed to like, I've been mulling over the problem and realized I cd avoid such trouble in the future by only reviewing books I like, and boiling my review of said books down into seven words:
Scholar like books.