There are 4 books in the Witte & Co. Investigations series.
The Witte & Co. Investigations series does not have a new book coming out soon. The latest book, The River Throne (Book 4), was published in January 2017.
The first book in the Witte & Co. Investigations series, The Weeping Lore, was published in April 2015.
The Witte & Co. Investigations series primarily falls into the Fantasy genre.