Sebastien de Castell is the author of the acclaimed swashbuckling fantasy series, The Greatcoats, as well as the six-book YA series, Spellslinger. His debut novel, Traitor's Blade, was shortlisted for both the Goodreads Choice Award for Best Fantasy, the Gemmell Morningstar Award for Best Debut, the Prix Imaginales for Best Foreign Work, and the John W. Campbell Award for Best New Writer. His books have been translated in sixteen languages and optioned for film and TV.

Kristi Charish is a scientist and science fiction/fantasy writer whose published works include the critically acclaimed urban fantasy series, Kincaid Strange and The Adventures of Owl. A self-described recovering fly geneticist, she received her BSc and MSc from Simon Fraser University in molecular biology and biochemistry, and her PhD in zoology from the University of British Columbia. Persephone is her debut science fiction novel.