[wrsh07]

If you're familiar with functional programming, I really like the learnxinyminutes reference for Haskell: https://learnxinyminutes.com/docs/haskell/

I'm not sure why, but the Haskell one clicks for me more than some of their other guides.

This isn't a great way to learn Haskell, but it's enough to start writing working code (and writing working code is a good way to learn!!)

[wrsh07]

Ooh, one nice book is the Okasaki purely functional data structures. The inline code is not Haskell, but iirc the appendix has Haskell implementations