A. D. Rhine is the pseudonym and debut venture of Ashlee Cowles and Danielle Stinson. The authors, previously published in the YA space (by S&S and Macmillan, respectively), are united by their military “brat” upbringing, childhood friendship spanning two decades, and love of classical literature. Ashlee holds graduate degrees in Ethics of War and Peace from Duke University and history from the University of St. Andrews. Danielle holds a master's degree in Law and Diplomacy from Tufts. Horses of Fire and Daughters of Bronze are the books they have always dreamt of writing together.