Real World Haskell, what a joy!

I just started reading "Real World Haskell" (http://book.realworldhaskell.org/). I'm quite new to Haskell (though not to functional programming), and I must say that it is a joy to read... I hope that in a few days I can start writing "real" programs with it (Project Euler is probably going to provide the content for my programs...)