"探索Class：继承与多态的完美结合"在厨房就等不及了做了

　　Class is a YA series set in contemporary London. Incredible dangers are breaking through the walls of time and space, and with darkness coming, London is unprotected. With all the action, heart and adrenalin of the best YA fiction (Buffy, Hunger Games), this is Coal Hill School and Doctor Who like you've never seen it before.