Can you recommend a good one? ... I hardly have time to 
  write code to learn it like people say is necessary.

The _easiest_ way to learn monads is through code (in haskell they're just a tricky typeclass: http://dev.stephendiehl.com/hask/#eightfold-path-to-monad-sa...) If you don't want to write code you could learn them like a mathematician from first principles (https://en.wikipedia.org/wiki/Monad_(category_theory)), but that seems so much harder to me I'm not sure why you would.