LEAD №01
Before the puzzle
The book is still closed. Good.
Open it slowly. Read the morning of the twenty-fifth of October. Read what I wrote in his Day Book. Then the seventeen clues. Apply them with a red pen, name by name, page by page. Take your time. There is no hurry.
The eighteenth clue is not among the seventeen. It is in something the killer carries with him without knowing it. When you find it, you will know.