Reading Planet: Astro Forbidden Classroom: The Intruder Jupiter/Mercury band

Welcome to Rockhead Primary, a school so ordinary even the teachers think it''s boring. But things start to change when a builder knocks down an internal wall and reveals something totally weird... Now the school has been invaded by an invisible intruder from another galaxy. Verna Lee and Jamie Ballard investigate, but our dynamic Year 6 duo are stumped by the alien''s antics. Can they track it do...