One of the Shades series. Josh's Mum works at a government astronomical agency and has told him how there is an asteroid on a collison course with Earth. The knowledge hasn't been made public (officially) though rumours are circulating on the Internet. The governments of the world don't want to let anyone know about it because chaos and anarchy might ensue as, if their latest scheme to send a rocket into the asteroid and knock it off-course doesn't work; then it will signal doom for planet Earth. As Josh and his friends Dave ( a girl called Davina) and Zack ( a nerdy Asperger-type in a world of his own but brilliant with numbers)do know; the book opens with them stealing a car and joyriding around before being caught by the cops! There is a lot packed into this very short book as Josh's friends' ideas look like saving the day.......or do they?