Its hard to believe, but the best 6 machine learning books are completely free:

 

- Deep Learning - https://lnkd.in/gxpnZ6Sa

- Dive into Deep Learning - d2l.ai

- Machine Learning Engineering - https://lnkd.in/eVCAYh4

- Python Data Science Handbook - https://lnkd.in/ehfZ-Tx

- Probabilistic Machine Learning - https://lnkd.in/gcSBFgk

- Machine Learning Yearning - https://lnkd.in/d3bC2d2R