[lordwarnut]

Kind of ironically I've enjoyed the 'Write Yourself a Scheme in 48 Hours'[1] which goes over how to write your own Scheme in Haskell. It introduces some of the more interesting monads although I'm not sure how idiomatic it is.

[1] https://en.wikibooks.org/wiki/Write_Yourself_a_Scheme_in_48_...