There are many introductory Haskell books, but i was (at the time i started learning) keen of those providing also a good basis on functional programming (which was a totally new world for me at the time). ...
K. Stengel, F. Schmaus, и R. Kapitza. Proceedings of the 12th International Workshop on Adaptive and Reflective Middleware, New York, NY, USA, Association for Computing Machinery, (2013)
N. Danielsson, J. Hughes, P. Jansson, и J. Gibbons. Conference Record of the 33rd ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages, том 41 из POPL '06, стр. 206--217. New York, NY, USA, ACM, (января 2006)