The Eldritch Heart series does not have a new book coming out soon. The latest book, The Sapphire Soul (Book 3), was published in October 2020.
The first book in The Eldritch Heart series, The Eldritch Heart, was published in May 2018.
The Eldritch Heart series primarily falls into the Fantasy genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.