"In 2008 the three of us undertook the challenge of addressing what we were seeing as the greatest emerging threat to American security in the 21st century - the ninja assassin.
It's been a long and dubious journey putting this book together, Sam was attacked by ninjas twice while gathering research materials at the Library of Congress. Phoebe nearly escaped a shuriken attack while driving to work in downtown Portland. And I was violently spammed while downloading 'sexy ninja images' online.
I think everyone will agree, though, the trials and tribulations have been worth it. What we have compiled is the greatest compendium on the ninja threat to date. We like to say that we are in the business of saving lives and taking out the ninja trash. And you know what? Business is good."