My dying sister vanished in the middle of the night. Usually, Megan called to me before dawn, but sunshine pooled on the bare wood floor beneath the window when I woke. My heart leapt into my throat. She's dead. After months of fighting, Megan finally...I hadn't felt it though. Wouldn't I know if the only person I ever loved-- I stumbled out of bed, tangling in my blankets, then raced to her room. Empty. The sheets were...