The New York Times bestselling story of a friendship frozen between life and death. "A fearless, riveting account of a young woman in the grip of a deadly illness." --The New York Times Lia and Cassie are best friends, wintergirls frozen in fragile bodies, competitors in a deadly contest to see who can be the thinnest. But then Cassie suffers the ultimate loss--her life--and Lia is left behind, haunted by...