The Shadow Figures

Faith is just a normal quiet girl, not popular, just shy. Starting her Sophomore year at Bringland High, she starts to notice people disappearing. Not disappear as in poof gone, but disappear as in fade, to a shadow. A dark, black, shadow, out of nowhere. Now all we need to find out, is how these people are significant enough not to disappear on Faith. And she needs to find out who else sees these shadows.