2010/3/1 David Leimbach <leimy2k@gmail.com>
I don't think a Haskell-monad book would be terribly interesting.  A book on taking the pieces of category theory, with a little bit more of the math, to apply to Haskell would be greatly interesting to me.

Also a book on learning what to look for for measuring Haskell performance in space and time + optimization seems like it'd be a good thing to have as well.

I'd really like to read such a book! Just hacking on a project [1] for a few months have tought me a lot about writing high performance Haskell code. I imagine that one could write a decent size book on the topic by gathering the experience of a handful of experienced haske, scraping the blogosphere, and looking at the high performance libraries out there.

1. http://github.com/tibbe/event

Cheers,
Johan