The Lost King by Devorah Fox

When all you have owned, everyone you have loved, and everything you have done are gone, who are you? King Bewilliam awakens one morning mysteriously transformed from a beloved, respected ruler and dragon slayer of renown to a homeless vagabond. Armed only with his wit and will, he battles mythic monsters and personal demons as familiar as divorce, career displacement and post-traumatic stress disorder to regain his kingdom. A Kindle Top 100 Fantasy, this journey of adventure, romance, and self-discovery tells a modern tale in a medieval setting.