I think the standard recommendation is Learn You a Haskell for Great Good!, available for free online. If you want to master the monad, try the Monad Challenge

I think the standard recommendation is Learn You a Haskell for Great Good!, available for free online. If you want to master the monad, try the Monad Challenges. http://learnyouahaskell.com http://learnyouahaskell.com https://mightybyte.github.io/monad-challenges/ https://mightybyte.github.io/monad-challenges/