The Hollow Star Saga series does not have a new book coming out soon. The latest book, A Cruel and Fated Light (Book 2), was published in May 2022.
The first book in the Hollow Star Saga series, A Dark and Hollow Star, was published in March 2021.
The Hollow Star Saga series primarily falls into the Dark Fantasy genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.