There are 3 books in the Vault of Dreamers series.
The Vault of Dreamers series does not have a new book coming out soon. The latest book, The Keep of Ages (Book 3), was published in September 2017.
The first book in the Vault of Dreamers series, The Vault of Dreamers, was published in September 2014.
The Vault of Dreamers series primarily falls into the General Fiction genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.