Perfect for pupils with a low reading age of 8 to 9, but a high interest age of 12 to 15, our Teen Reads will have readers on the edge of their seats. Just the right level of challenging vocabulary and plot-lines make these books highly accessible, drawing readers into exciting worlds whilst simultaneously developing their reading skills. When he was a kid, Liam had an imaginary friend called Billy. Billy Button. They did everything together. Went everywhere together. Best friends forever. Until Liam grew up and forgot Billy even existed. But Billy Button never forgot about Liam. Now he's back and wants revenge.