読んだ
http://blog.moertel.com/articles/2007/02/22/a-simple-directory-tree-printer-in-haskell
http://blog.moertel.com/articles/2006/10/31/introductory-haskell-solving-the-sorting-it-out-kata
http://blog.moertel.com/articles/2006/04/28/the-supermarket-pricing-kata-in-haskell
http://blog.moertel.com/articles/2006/04/05/the-bowling-game-kata-in-haskell
を読んだ。英語が簡単だったからいい感じ。