num_pages: 240
description: Kelly fears her sister Hannah's self-destructive behavior, after she becomes involved with the wrong crowd at school, is linked to a science fair project Hannah did on blood types.
language: English
title: What They Dont Know
titlecomplete: What They Dont Know
ratings_count: 36
awards: awardedAt: 946713600000
name: OLA Forest of Reading Red Maple Award
publisher: Fitzhenry & Whiteside