"The way home. The spires. They've been looming in the distance, watching silently as the young survivors of Aero Horizon Flight 16 crossed a gauntlet of surreal and dangerous landscapes. After weeks of hardship, Molly and her friends have reached the eerie structure they spotted at the start of their journey, all in a desperate bid that it will provide answers about their ordeal...and perhaps a way home. Here the survivors will finally learn the truth behind the rift. And here they'll encounter a monster far deadlier than anything they've faced yet. Critically acclaimed author Aditi Khorana brings her mind-bending expertise to this gripping conclusion to the Horizon series"-- Publisher's description.