Looking for X - Deborah Ellis

Smart and independent, 11-year-old Khyber lives with her mom, Tammy, a former stripper, and her autistic twin brothers in a poor Toronto neighborhood. Though she doesn't have a lot in common with her classmates, Khyber does have wonderfully eccentric friends: Valerie, Toronto's meanest waitress, and X, a homeless woman in hiding from the secret police." Despite having to deal with pompous social workers who make her mother cry and ignorant kids who make remarks about her brothers, Khyber manages to enjoy herself, poring over atlases, planning exotic journeys, and taking peanut butter sandwiches to X. But when Tammy decides to move her sons to a group home for proper care, Khyber's world starts to crumble. She fights with her mom and then gets expelled from school. To make matters worse, X suddenly disappears. Khyber sets out to find her in a wild all-night odyssey of self-discovery.