The modern day wizards who are recurring supporting characters in this series are a gay couple. Ecker, B.A. Independence Day. Pawn to Queen four. Fried Green Tomatoes at the Whistle Stop Cafe. Series of detective novels which feature a lesbian investigator.
Flashpoint is one.
Apparition Alley, Liberty Square, and Murder by Tradition are all, I think, part of the same series. The one I read was great. Forster, E.M. Maurice. The dyke and the dybbuk. Annie on My Mind.