There are 3 books in The Witch's Child Trilogy series.
The Witch's Child Trilogy series does not have a new book coming out soon. The latest book, Julia Unbound (Book 3), was published in June 2018.
The first book in The Witch's Child Trilogy series, Julia Vanishes, was published in June 2016.
The Witch's Child Trilogy series primarily falls into the Heroic Fantasy / Sword & Sorcery genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.