Ask HN: light mathematical/scientific reading with computer exercises?

I'm looking for books that discuss neat topics in math or the sciences which are oriented around computer experimentation.

One examples of such books are The Computational Beauty of Nature. Another is From Calculus to Chaos. A third I've recently enjoyed is Daniel Ashlock's book on evolutionary computation.

I also tremendously enjoyed Steve Skiena's "Calculated Bets", which discussed his use of mathematical modelling to gamble on jai alai with real money.

Any other suggestions?

No dry theorem-proof-theorem-proof-lemma-proof stuff like the kind I suffered through in college, I tried reading that in my spare time outside of classes and I failed miserably.