Young adult books a couple of of info about the subject books. Another book of his which i enjoy is Momo, which talks about "time thieves" and the methods that we use our time. http://Ctpheine.it/__media__/js/netsoltrademark.php?d=Ttceducation.co.kr%2Fbbs%2Fboard.php%3Fbo_table%3Dfree%26wr_id%3D1484729