I've done some first steps in J and it's really mind blowing. It's hard to get into it and you have to learn a lot before you can read programs. (Since I had to

I've done some first steps in J and it's really mind blowing. It's hard to get into it and you have to learn a lot before you can read programs. (Since I had too little practice, I can't read it.) But the underlying concepts are not too difficult, even to someone like me with not-so-good math knowledge. I bought the e-book version of "Fractals, Visualization and J" by Cliff Reiter to improve my understanding. It's only ~7€ at lulu.com and I bought if to learn more about the impressive visualizations possible with J.