<a href="http://www.amazon.com/Gentle-Introduction-Theory-Mathematical-World/dp/0821813390" rel="nofollow">http://www.amazon.com/Gentle-Introduction-Theory-Mathematica...</a> is a cool little book that introduces matrix game theory. (And I wrote <a href="https://metacpan.org/pod/Game::Theory::TwoPersonMatrix" rel="nofollow">https://metacpan.org/pod/Game::Theory::TwoPersonMatrix</a> because of it.)