X-link to the DRM-free thread for the new Humble Bundle:
Humble Book Bundle Python presented by No Starch Press features an assorted of DIY computer programming titles focused around that language, ranging from kids/newbie-friendly to advanced topics, and covering how to use Python for math, games, and more. A number of repeats from previous bundles, but at least 3 new titles which are probably good value for money if you want them, considering the regular prices for these things.