Corakinus finds a way to retake his throne and strikes at the teenagers who defeated him by killing their loved ones. To stop Corakinus and the Shadow Kin, Charlie and April must make the ultimate sacrifice.

Coal Hill School has been a part of the Doctor Who Universe since the very beginning, but that has come at a price. All the time-travelling over the years has caused the very walls of space and time to become thin. There's something pressing in on the other side, something waiting for its chance to kill everyone and everything, to bring us all into Shadow. Fear is coming, tragedy is coming, war is coming. Prepare yourselves, Class is coming. Class is a YA series set in contemporary London. It is scary, funny, and as painful and sharp as youth. It will also shine a light on a whole new corner of the Whoniverse.