There are 6 books in the Alexis Silver, Mermaid Detective series.
The Alexis Silver, Mermaid Detective series does not have a new book coming out soon. The latest book, Silver Kingdom (Book 6), was published in February 2023.
The first book in the Alexis Silver, Mermaid Detective series, Silver Light, was published in November 2017.
The Alexis Silver, Mermaid Detective series primarily falls into the Dark Fantasy genre.