On 5/23/07, Donald Bruce Stewart wrote:

Bryan O'Sullivan, Don Stewart and John Goerzen are pleased, and frankly, very excited to announce that were developing a new book for O'Reilly, on practical Haskell programming. The working title is Real-World Haskell.

That is simply great! I've been looking forward to read a book like that for so long.

28. Advanced Haskell: MPTCs, TH, strong typing, GADTs

Existential types are a must in this chapter! even more important that TH and GADTs.