I was a bit late - I remember trying so hard to find it when I was 16-17, but failing, then eventually hearing that it had been written by the FBI so that inexperienced troublemakers would blow themselves up before becoming a danger to anyone else... Then I found out about ammonium nitrate and how easy it was to come by, and started experimenting with it... But then Oklahoma City happened when I was about 18 or 19 and was kind of a wake up call.