There are 2 books in the Ernest Cunningham series.
The Ernest Cunningham series does not have a new book coming out soon. The latest book, Everyone On This Train Is A Suspect (Book 2), was published in January 2024.
The first book in the Ernest Cunningham series, Everyone in My Family Has Killed Someone, was published in January 2023.
The Ernest Cunningham series primarily falls into the Mystery genre.