Here are 13 books on Machine Learning and Data Mining that are great resources, references, and refreshers for Data Scientists. (This is definitely a small selective subsample of the many excellent books available.)

And for my astronomer friends, here are a couple of additional suggestions:

14. Statistics, Data Mining, and Machine Learning in Astronomy: A Pract..., by Z.Ivezic, A.Connolly, J.VanderPlas, A.Gray

15. Advances in Machine Learning and Data Mining for Astronomy, by M.Way, J.Scargle, K.Ali, A.Srivastava