The Magic Mirror

Fairest of All
In Fairest of All, (the first book in the series) Abby and Jonah go to their first fairy tale, Snow White. It's only inhabitant, Maryrose, sends them to different fairy tales, for reasons unknown. At the end of the book, there is another fairy in another magic mirror. The fairy tells Abby and Jonah that it is too dangerous to tell anybody about the mirror.