Witches' Skins

The Witch Skin Quartet (4 story bundle, with 2 new stories) Inspired by a nightmare, these four stories are about witches' skins containing the essence of the witch, lying in wait for a chance to influence the living and return from the dead. Which witch skin is which? I'm publishing them all here at once to avoid confusion.
Includes Witch's Skin, Witchskin, The Skin Of A Witch, Skinning The Witch