Machine Learning for Hackers vs Machine Learning in Action to be precise. Two books. One topic. Different languages. John D. Cook compares and contrasts:
Both books are about the same size and many of the same topics. One difference between the two books is choice of programming language: ML for Hackers uses R for its examples, ML in Action uses Python.
I was somewhat interested in ML for Hackers since I’m familiar with and admire Drew Conway’s online writings. The use of Python better aligns ML in Action with my interests though.