Isso classicamente parece o The Time of the Dark de Barbara Hambly. Foi originalmente publicado em 1982, mas definitivamente foi reimpresso. Aqui está uma breve descrição do site do Hambly:
For Gil, it started with the dreams; of a city being abandoned because of some nameless horror that was slowly invading, and of the wizard Ingold, who later appeared in her kitchen. For Rudy, it started with an ill-fated beer run that linked him with Gil and Ingold and drew him into a world unlike his, where the infamous Dark was invading. A world where academic Gil became a warrior and punk/artist Rudy a mage, and where everyone was working to reach a haven from the Dark.
A história continua em The Walls of Air e Os Exércitos da Luz do Dia . Há dois livros seguintes, Mother of Winter e Icefalcon's Quest . Eles foram publicados 13 e 11 anos depois.