Programming in Haskell is an incredibly clear and concise introduction to the basic features and modus operandi of Haskell. It is not at all dry, and very readable. It's implementation is very much focused on using the interpreter to understand small bits and pieces rather than compiling a more complicated program.
This book just scratches the surface of Haskell, but is a great introduction. I highly recommend it to anyone interested in Haskell, but maybe not so much for those interested in functional programming in general.
I consider myself an intermediate programmer, but no guru at all, and anyone who is fairly competent in an imperative or OO language should be able to page through the book one day, read a few articles online that night, and finish the book cover to cover the next.
I would consider this book a good, simple supplement to a larger, more useful but less friendly guide. Those interested in Haskell should check out [...] and look for the many excellent tutorials available on the web.