In The Animal Review, they look at animals and grade them. A king cobra, for example, gets an A+. An alpaca, which I admit is a funny creature that I love in part because it looks odd, gets an F.
They use some science, and exaggerate a lot. I read a few entries and it made me laugh. I won't read it straight through. Instead, it'll go into my second "office." And you know what I mean.
You can read more on their book blog. One note: the cover you see here, which I pulled from bn.com, gives the alpaca a D- while the book I have on my desk gives it an F. Maybe the alpacas protested?