Tsutomu Shimomura, the world’s greatest computer security expert, had a tough time from the Christmas Day 1995. His home computer was under attack. Infamous computer hacker Kevin Mitnick deployed clever method to gain access to Shimomura’s privacy and value computer software. Fight back! It was until Valentine Day in 1996 that the computer security expert, with his sense and knowledge, hunted down the notorious hacker with little assistance of Federal Bureau of Investigation (FBI). Takedown, the story itself, was co-authored by Shimomura himself with John Markoff, a New York Time reporter.