Dinah Lloyd & Harvey hoped they'd seen the last of the Demon Headmaster when they moved to a new village. However almost immediately they can tell something's not right about the place. There's a loud buzzing noise coming from the biogenetic research centre & a creeper that grows extraordinarily fast. Why are the security guards so scary? & why does everybody in the village use exactly the same words to describe the research centre? Dinah becomes even more suspicious when someone pretending to be a doctor comes to their house & manages to trick them into giving DNA samples.. . With the help of their new friend Simon the children investigate & find a way into the building. Inside they discover a huge egg. Hatching from it is the result of an experiment conducted using Dinah's DNA-an experiment that is the work of the Demon Headmaster. This time he's determined that no one will stand in the way of his plans! 'this will be greatly enjoyed' Books for Keeps