[Haskell-cafe] Monad/Functor Book

[Dave at haskell.org]

Given the amount of material posted at haskell.org and elsewhere
explaining IO, monads and functors, has anyone considered publishing
a comprehensive book explaining those subjects?  (I am trying to
read all the material online, but books are easier to read and don't
require sitting in front of a computer to do so. Plus I can write in
books :-). )

Thanks, Dave Feustel