I remember the days when O’Reilly was the only publishing house with Python books. Moreover, I remember when O’Reilly claimed they would only write a single book on a topic, so that there would be no overlap among their titles. Nowadays, there are many different O’Reilly books about Python, and there seems to be a great deal of overlap. In this talk, Tanya Schlusser tries to cast some light on the differences between these books, and who might benefit from each one.