"探索Class：深入理解对象导向编程"静静的自我改造计划

　　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.