In 2009, Kay's first novel, The Ghost Trap, was published by Leapfrog Press. In the last five years, Kay has traveled all around Ireland, Scotland, and England to collect the origin stories of folkloric creatures in libraries, shops, and from storytellers. Her latest novel, a Prohibition-era grounded fantasy, By The Dark O’ The Moon placed as a quarterfinalist in the 2022 Screencraft Cinematic Book Competition. That novel has been adapted into a screenplay and she is at work on a sequel.