Are Those Turtles?

Why, yes, they are, indeed, turtles. That's the animal chosen by the
publisher for our book cover. And before you ask us, "Why?" 丕ｹ we
don't really know. It's cool, and our wives are pleased that at least
something "icky" wasn't chosen to represent Subversion.

http://svnbook.red-bean.com/index.en.html