Book excerpt: Baba Yaga is an old hag who lives in a house built on chicken legs and kidnaps small children. She is one of the most pervasive and powerful creatures in all mythology. She appears in many forms: as Pupa, a tricksy, cantankerous old woman who keeps her legs tucked into a huge furry boot; as a trio of mischievous elderly women who embark on the trip of a lifetime to a hotel spa; and as a villainous flock of ravens, black hens and magpies infected with the H5N1 virus. But what story does Baba Yaga have to tell us today? This is a quizzical tale about one of the most pervasive and powerful creatures in all mythology, and an extraordinary yarn of identity, secrets, storytelling and love.