Louis Greenberg is a Johannesburg-bred author, editor and writing tutor. He was a bookseller for several years, and has a Master's degree in vampire fiction and a doctorate in post-religious apocalyptic fiction. His first novel, The Beggars' Signwriters, was shortlisted for the Commonwealth Writers' Prize, and he's also the author of Dark Windows and Green Valley. As S.L. Grey, he co-writes horror fiction with Sarah Lotz, including The Mall and The Apartment. He is currently based in England.