L'héritage des signes, tome 3Karen Mahoney2013

After being tricked into opening the doorway to the Demon Realm by Aliette, the Wood Queen, Donna Underwood is faced with a terrible ultimatum from the newly released demon hordes. They demand that the alchemists deliver the Philosopher's Stone, or their reaper storm will plunge the world into a devastating modern-day Dark Age.

Donna is sent to London, England, where she must complete her alchemist's training and learn how to recreate the Stone. But time is running out. Between facing the vengeful demon king, Demian, and collecting the Stone's elements, Donna realizes she must give her own life in order to succeed. And this time, even braving death may not be enough to save the world.

Titre original : The Stone Demon (2013)