How many books are in the The Bellum Sisters series?

There are 4 books in the The Bellum Sisters series.

When will the next book in the The Bellum Sisters series be released?

The The Bellum Sisters series does not have a new book coming out soon. The latest book, The Fallen King (Book 4), was published in January 2013.

The first book in the The Bellum Sisters series, Chains of Frost, was published in October 2012.