The Girl in the Tower

"The magical adventure begun in The Bear and the Nightingale continues as brave Vasya, now a young woman, is forced to choose between marriage or life in a convent and instead flees her home--but soon finds herself called upon to help defend the city of Moscow when it comes under siege"--

Vasilisa's gift for seeing what others do not won her the attention of Morozko-- Frost, the winter demon. But Frost's aid comes at a cost, and her people have condemned her as a witch. Driven from her home, she faces an impossible choice: marriage or life in a convent. Instead she dresses herself as a boy