The Siren Chronicles series does not have a new book coming out soon. The latest book, Smoke and Ruin (Book 3), was published in February 2018.
The first book in The Siren Chronicles series, Coral and Bone, was published in July 2014.
The Siren Chronicles series primarily falls into the Fantasy genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.