There are 4 books in the Sherlock, Lupin, and Me series.
The Sherlock, Lupin, and Me series does not have a new book coming out soon. The latest book, The Cathedral of Fear (Book 4), was published in August 2015.
The first book in the Sherlock, Lupin, and Me series, The Dark Lady, was published in January 2014.
The Sherlock, Lupin, and Me series primarily falls into the Mystery genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.