The Incredible Shrinking Ghost

Do you think ghosts need to go to the toilet? Or do ghosts kiss? Yuck!
Alex and Phoebe have a lot of questions about ghosts, but no one to ask ? until they meet Walter. He knows everything there is to know about ghosts. After all, he is one!
But Walter has questions of his own. And he?s had three hundred years to think of them!
Together, the three friends must find a way to set Walter free. But it isn?t easy to keep a ghost secret. Particularly when his friends turn up!
Walter has one advantage though. He can shrink himself and hide in Alex?s pocket!