Two that I have enjoyed: 1. "Machine Learning" - Murphy It's a classic and a rigorous introduction to the subject. It focuses on theory over implementation so

Two that I have enjoyed: 1. "Machine Learning" - Murphy It's a classic and a rigorous introduction to the subject. It focuses on theory over implementation so it's more for developing a principled understanding of machine learning fundamentals than for getting you up to speed with modern tools necessary for solving real problems. 2. "Neural Networks and Deep Learning" - Nielson This is a free online book that is very accessible and engaging. It covers basic theory and implements examples in Python.