International Thriller Writers ( ITW ) , was founded October 9 , 2004 , at Bouchercon XXXV , the " World Mystery and Suspense Conference " , in Toronto , Ontario , Canada . Six months later , some 150 authors with more than one billion books sold worldwide had joined the organization as founding members . As of October 5 , 2014 , the organization 's website boasts of having over 3,100 members in 28 countries
Bouchercon XXXV
Bouchercon XXXV
International Thriller Writers