I have bought that book some years ago and wouldn't do so again. It was very disappointing to see neither a focus on Haskell nor on data analysis. It scratches both topics but covers only very elementary things. The content is mostly short receipts that were to me of no value at the time.

For people interested in the topics I'd recommend to buy some other good books, on Haskell and data analysis separately.

If, however, receipts are to your liking and you're only starting out with Haskell / data science maybe this is something for you (or maybe not).