The Sibling Split series does not have a new book coming out soon. The latest book, The Impossible Wish (Book 4), was published in August 2016.
The first book in the Sibling Split series, Family Fix-It Plan, was published in August 2016.
The Sibling Split series primarily falls into the General Fiction genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.