Tetrarch

"Edward and Rosanna buy an antique door for their apartment, having no idea that they have purchased their passageway to another world. But when they step through the doorway, they find themselves in a place at right angles to real time, where the conventional greeting is 'have you loved well?'; where the army is a vehicle for play therapy and the real weapons are powered mandalas; where the most precious treasure is a crystal the size of a grain of sand ....He is a colonel in the Losian army, and she, a slave girl, in a place where people are only owned if they choose to be...."from book flap.