Underland

Pursued by menacing strangers through her small Midwest city, twelve-year-old Alyssha Dodson takes refuge in a mysterious room under a bridge, a place that turns out to be a doorway into another universe.
In the country where she then finds herself, Alyssha learns that the pursuit has not ended. A powerful and sinister man, Lord Raf Var Ne, seeks to gain possession of an object she was given years ago by her older brother a few days before he went missing. Told she can't return to her own world, she begins a search for that brother, aided by Lord Raf's charming but impetuous stepson. In the process, the two become involved in a revolutionary conflict.
Underland is the story of a girl's coming of age in the midst of an adventure like no other.