There are 2 books in the Sisters of Blood and Spirit series.
The Sisters of Blood and Spirit series does not have a new book coming out soon. The latest book, Sisters of Salt and Iron (Book 2), was published in April 2016.
The first book in the Sisters of Blood and Spirit series, Sisters of Blood and Spirit, was published in April 2015.
The Sisters of Blood and Spirit series primarily falls into the Horror genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.