'Call of the Forgotten' is a spinoff series to the Iron Fey series. The first book is The Lost Prince written by Julie Kagawa. Call of the Forgotten is a triliogy and the last two books still to be announced.
The series follows 17 year old Ethan Chase as he gets involved the world of the Fey again. Ethan grew up with a distaste of Nevernever because of his older sister, Meghan Chase, the Queen of the Iron Realm. He must face a challenge to help protect the world he wanted nothing to do with.
The Lost Prince was released on October 23, 2012.
The Iron Traitor was release September 4, 2013
The Iron Warrior is set to be released in 2015