Hvem tog stjernen?

There's a Christmas tree on the last page of the notebook, drawn in green biro by someone who pressed far too hard. Come 1 December, its star has gone, and all that's left is a strip of empty sticky tape. Ms. Margin says nobody goes home for Christmas until it is back, and you're the detective. Open a door a day, pin each clue to the evidence board, and seal your guess in an envelope before the 24th.

Peeling back the tape...