Each of Mercedes Lackey’s ELEMENTAL MASTERS novels is a stand-alone fairytale retelling. Some of the novels have overlapping characters, but you can read these books in any order. The fourth book, Phoenix and Ashes, is a mostly pleasant Cinderella story set in England during The Great War. Maya, the Indian doctor from The Serpent’s Shadow, is a minor character. I listened to Michelle Ford narrate the audio version of Phoenix and Ashes (Audible Studios).