About the Book: The highly anticipated fourth book in the Sunday Times and #1 New York Times bestselling and award-winning Supernatural Investigations series that began with Amari and the Night Brothers! Perfect for readers aged 8+ and fans of Skandar, Percy Jackson and Nevermoor. The fourth epic adventure for Amari and her friends at the Bureau of Supernatural Investigations. In the wake of the Bureau of Supernatural Investigations’ war with Dylan Van Helsing and the magicians, Amari Peters has stepped back from being a Junior Agent to spend the school year as a normal kid. But now she’s faced with a decision: return to the Bureau and join an elite new agent programme – or retire for good, which would mean safety, but also losing her memories of the supernatural world. Soon she finds that she may not have a choice. A deadly new curse is threatening the supernatural and mortal worlds as people are slowly becoming machines beneath their skin. Hundreds of cases have been cropping up with no cure in sight. And when the curse hits someone close to Amari, it’s up to her to get to the bottom of this deadly mystery – even if it means trusting an old enemy.