The Sherlock Files series does not have a new book coming out soon. The latest book, The Missing Heir (Book 4), was published in June 2011.
The first book in The Sherlock Files series, The 100-year-old Secret, was published in April 2010.
The Sherlock Files series primarily falls into the Suspense genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.