The White Darkness: Geraldine Mccaughrean

A clever original book geared towards teens. After a girl's father mysteriously dies her father's friend, whom she calls Uncle Victor, moves in with them. He plans a trip for them to France and then hides Sym's mother's passport so she can't go. Victor then takes Sym to Antarctica where he is obsessed with the idea of a hole in the earth where other worlds are accessible (think journey to the center of the earth) Through a lot of dirty dealings Sym learns the truth about Uncle Victor, his plans for her, and she learns about herself. The end is interesting where you wonder if Sym's imaginary friend- who is the deceased Titus Oates, is really all that imaginary. I really enjoyed this book!