I'm reading Never Deal with a Dragon and then when read about the doppelgangers attacking and cloning a guy, it sounds terrifying. But I wondered why I've never heard of this thing before. And looking through the critter books I have, Running Wild and Howling Shadows and can't help but notice, no doppelgangers.
Do they exist outside of this novel? Are there stats for one? Is it ever explained what it is or where it came from? I'm still reading Never Deal with a Dragon, and if it's a spoiler feel free to drop a bomb, 'cause I don't really believe a good story can be ruined if you know its outcome.