https://www.amazon.com/Bayesian-Methods-Hackers-Probabilisti...
There's a full version of another good book ("Think Bayes: Bayesian Statistics in Python") available as a PDF from the publisher here:
http://greenteapress.com/wp/think-bayes/
(related Amazon reviews)
https://www.amazon.com/Think-Bayes-Bayesian-Statistics-Pytho...