Porting to Python 3 is available online for free!
Hi, I’m craaaaaaaaaaaazy Len, and boy do I have an offer for you! Yes, you can get my book, the award-winning(*) “Porting to Python 3” for cheaper than cheap! Yes, it is available on-line, for absolutely free, and all you need to do is point your browser at http://python3porting.com/
There you will find the whole book in HTML format. And you don’t even need 3D-glasses!
(*) No actual award won. Side-effects include Python 3 envy amongst web developers.
Of course, if you want to, you can still buy a hard-copy.