The Silver Sisters series does not have a new book coming out soon. The latest book, The Silver Moon of Summer (Book 3), was published in June 2017.
The first book in the Silver Sisters series, The Forget-Me-Not Summer, was published in May 2015.
The Silver Sisters 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.