Perhaps they're busy, don't want to go public on Amazon.com. Or maybe they really didn't like the book after all (one colleague characterised it as a "crazy book". Oh well..). And there is that adage about not saying anything if one can't say something nice.
Don't get me wrong: I'm not exactly on the hunt for negative public reviews. Still, I'm open to constructive feedback about the book's usefulness and find the recipient/reviews ratio intriguing.
If you've read 'Nonprofit Hell' and are reading this, be a brave soul and drop me a line with your thoughts about the book or some scenarios you've experienced (I'm not writing this blog post to incite a stream of explanations regarding why you haven't written the review yet).