5 links
Haskell Reference at Zvon
zvon.org
A thoroughly indexed reference to Haskell syntax and libraries with many examples.
Haskell Tutorial
di.uminho.pt
An introduction to Haskell, including explanation of basic concepts and exercises. [Postcript]
Haskell: The Craft of Functional Programming
cs.kent.ac.uk
By Simon Thompson; Addison-Wesley, 1999, ISBN 0201342758. Edition 2, introductory textbook to functional programming in Haskell. [University of Kent]
Haskell: The Craft of Functional Programming
amazon.com
Descriptions, reviews, purchase source. [Amazon.com]
Monads for the Working Haskell Programmer
engr.mun.ca
This short tutorial introduces monads to Haskell programmers.