Born and raised in California, May read fantasy novels as a child, and was especially influenced by Garth Nix's Sabriel.[1] She became a professional photographer and model, working for magazines and publishing houses.
She moved to Scotland to study for a PhD in anthropology at St Andrews University,[2] and in 2010 wrote the first draft of what was to be her first YA novel, The Falconer, in response to a bout of seasonal depression.[3] In 2013 the book was published by Gollancz.
In 2015, she collaborated with Laura Lam to write a fantasy duology for adults, The Seven Devils,[2] originally conceived by May as "Mad Max: Fury Road, in space." The pair, both published authors, met at a book event in 2013.[4] Lam, a creative writing lecturer at Edinburgh's Napier University, and May, a PhD student, quickly became friends, after discovering a common interest in feminist fantasy fiction.[4]
In 2024, May published the Slavic-inspired fantasy novel To Cage a God, which was listed in Paste Magazine's Best New Books in February 2024.[5]
May lives in rural Scotland with her husband.[6]