An explanation of how Gretel does what she does. She might honestly be the worst villain ever; most powerful, maybe. She's not evil, per se, but she's startlingly, incredibly malignant. I can see why they dropped her on that island and didn't think twice about it. This will make no sense to you if you haven't read the Milkweed triptych, but if you have it's a brilliant addition, and the Tor people make it available for free (!) on their website.