The Finnegan Zwake series does not have a new book coming out soon. The latest book, The Coral Coffin (Book 5), was published in January 2002.
The first book in the Finnegan Zwake series, The Horizontal Man, was published in August 1999.
The Finnegan Zwake 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.