内容简介：
"The safe in Ken's basement was a gun safe almost the size of a refrigerator. It weighed four hundred pounds and was bolted to the wall. With a few turns of the dial Ken opened the safe and pulled out a wooden box and handed it to Adams. He opened the lid, took out the knife and handed it to Sara. 'It's exactly the same as the others," Adams said. Ken took the disc out of the safe. 'The computer is in my office upstairs." They were all anxious to see what the disc contained, yet they were afraid of what they might find. Ken downloaded the disc and printed the document. Adams retrieved the paper from the printer and went to work circling every third letter in from the end of each word. Sara and Ken sat in wait as Adams decoded the message. 'Oh no " Adams looked as if he saw a ghost. He handed her the decoded message and she began to read. With every word she was trembling more and more."