The Midnight Sorceress
Cassandra is summoned by a magical owl, and she discovers that another world exists in the middle of Siberia, where monsters, faeries, elves, and sorcerei fight for domination. She soon becomes inextricably involved in the affairs of this other dimension that lies behind a magical mirror, and everyone in that realm is at the mercy of the blue moon. But Cassandra has never expected to meet a sorceress quite like Princess Vasilisa, not to mention, she is an actual legendary Vasilisa the Wise in the fairy tale she has read as a child. But Vasilisa is also a daughter of an evil Czar who is a sorcerer himself, and whose plan is to overrule the human race and the magical folk with the help of an all-powerful dark lord. When the night of the solstice arrives, Cassandra's mortal world and the magical world will collide. If she doesn't help Vasilisa find the Golden Wand and stop her greedy father before the winter solstice, both their worlds will fall into a possible apocalypse.
Tiredness forced Cassandra to lie down. It was a big boat. Besides her, Vasilisa had fallen into a slumber again. Cassandra looked up at the moon, which was as thin as a fingernail. Then, painfully, feeling the boat rock beneath her, she propped herself on one elbow and sat up again. The mist was still there, hanging low and ragged over the surf……