“Happy 53rd birthday, Doctor. Welcome to the first day of your death. I belong to some moment in your past. You ruined my life. Perhaps you don’t know how or why or when, but you did. You filled all my moments with disaster and sorrow. You ruined my life. And now I am determined to ruin yours.”

Thus begins this fast-paced psychological thriller that grips you from the first page and carries you to the end.

It has sold more than 300,000 copies in Spanish across 12 editions and has been translated into German, Italian, French, Portuguese, among other languages.