There are 4 books in the Tales of the Acheron series.
The Tales of the Acheron series does not have a new book coming out soon. The latest book, Last Flight of the Acheron (Book 4), was published in September 2018.
The first book in the Tales of the Acheron series, Prodigal, was published in November 2017.
The Tales of the Acheron series primarily falls into the Science Fiction genre.