Jason Hook, real name Thomas Jason Grinstead, was born in Toronto Canada in 1970. He started having guitar lessons when he was just six years old and he also learned violin, drums and piano. After leaving school, Jason Hook played in a number of local bands and eventually formed a band called Monkeyhead which signed to Elektra records and had some success but when this folded, he relocated to Los Angeles. Jason Hook joined hard rockers Bullet Boys and he also started work as a session musician. In 2009, Jason Hook joined Five Finger Death Punch. Shortly after his arrival, the band released “War Is The Answer ” which reached number 7 on the billboard album chart and singles from the album also charted.