Into Thin Air: 57 (Nancy Drew S.) - Tapa blanda

George's neighbour Mark Rubin has been sacked by his detective agency just as he felt he was close to solving a case. An embezzlement suspect has vanished in a helicopter crash and the case has been closed, but Mark is convinced that the embezzler is still very much alive. He thinks that, with Nancy's help, he can solve the mystery and clear his name at the same time, but someone else has other plans. In no time, Nancy begins to think that if the embezzler isn't dead, she and Mark might very well soon be.