In Sunlight and in Shadow — Alter S. Reiss

Bet is sworn to the service of the Last Court, a secret magical society that exists in the shadows of modern New York City—and her heart belongs to the Grand Sorceress. But her attempts to court Vivienne end in disaster, and disillusionment drives her from the Last Court.The Court, however, isn't done with Bet.In Sunlight and In Shadow was originally published under the names Alter S. Reiss and Naomi Libicki.