Publisher's Synopsis
It appears in your window every night, a mysterious configuration of lights that hovers for a moment, then is gone. You don't dare tell your Aunt Vivian or Cousin Pippa. Surely they'll laugh.
But Pippa pries the secret from you and doesn't laugh. Instead, she gets out her notebook and declares it the next mystery she wants to solve. It's your most difficult mystery yet, and your cousin needs your help to gather clues.
See if you can crack the case before she does!
