The Keep of Ages
In O'Brien's high-stakes conclusion to the Vault of Dreamers trilogy, Rosie has her final showdown with the villainous Dean Berg. She returns home to find her family has mysteriously disappeared. A clue left by her sister leads Rosie to Grisly Valley, the contaminated ruin of a horror theme park long abandoned after a nearby nuclear meltdown. She knows that Berg is once again manipulating her every move and as Rosie struggles to outmaneuver him, she unearths the ultimate vault of dreamers and a consciousness more powerful and dangerous than any she's ever imagined. Faced with unspeakable suffering and otherworldly beauty, Rosie must discover how to trust her mind, her friends, and reality itself.