The Maggie Brooklyn series does not have a new book coming out soon. The latest book, The Secrets at the Chocolate Mansion (Book 3), was published in September 2013.
The first book in the Maggie Brooklyn series, Girl's Best Friend, was published in October 2010.
The Maggie Brooklyn 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.