The Blood & Fire series does not have a new book coming out soon. The latest book, Radicals (Book 2), was published in May 2014.
The first book in the Blood & Fire series, Raksha // Halo, was published in May 2013.
The Blood & Fire series primarily falls into the Action Adventure and Dystopian genres. This young adult series was written for ages 12-17, but can be enjoyed by adults too.