the annual Yuletide guessing post

You have more chances than usual this year to guess what I wrote for Yuletide. If you guess right, you get, uh, bragging rights? And, I dunno -- let's say I'll mail you a cover flat of A Natural History of Dragons if you want one, since I have a whole stack of them now, and no idea what else to do with them. :-)

( Clues behind the cut )