Part 2, Book 1: The Phantom Shield

The sixth book in the series, "Black Crown & The Phantom Shield," details the events in which a magical weapon known as the Phantom Shield is stolen, having been used to seal multiple Devil-Kings and Council of Twelve members.

Set in the year 2024, the book begins when Amber is called to a meeting between the Council of Twelve, where they discuss three of their missing members, who mysteriously disappeared. After finding out the cause is the Phantom Shield, Black Crown is tasked with finding the weapon and retrieving it, before it's too late.