I don’t actually have a reason. At first I thought that ten words would be easy, and my reasoning could be thus called sheer laziness. Trying to compress a description of and my feelings towards an entire book in a mere ten words, however, proved more difficult than I originally anticipated.
That’s not a complaint, by the way; I like the challenge. One of my favorite forms of writing is flash fiction, so putting word count restraints on my reviews isn’t so much word as a challenge, and one that I’m eager to face.