Tango with Django

I enjoyed Tango with Django, and was very positively surprised when they emailed me an update for the PDF I bought. The first was inexpensive, and worth it, hopefully helping support the authors. Not only a good tutorial for Django, but the authors made it even better offering the free improved/corrected version. The final project is a Django webapp that allows visitors to add sites and rank them. Many different aspects in Django are looked at, as well as beyond, such as CSS, Bootstrap, search, Jquery, AJAX, etc.

I remember liking http://www.tangowithdjango.com/ . It goes over building a link aggregating service using Django. However, I also remember it being free. Doesn't seem to be an option with the most recent release.