Without spoiling the fun, this book is about a young boy called Tom who is sent to stay with his Aunt and Uncle for a while, and whilst lying in bed at night he hears the old grandfather clock downstairs chime.  Unbelievably the clock chimes 13 times, so Tom rushes downstairs to investigate and finds himself in the garden where he sees some other children – but they can’t see him, with the exception of Hatty who becomes Tom’s friend.  Are Hatty and the others ghosts, or is Tom a ghost?  Read this delightful book to find out.