Learning multiple languages (question for general discussion)

[Diez B. Roggisch]

> Do you have any opinion of "Types and Programming Languages" by
> Pierce?  Autrijus Tang (the guy who started PUGS, the Perl 6
> implementation in Haskell) raves about it in an interview, and another
> guy I know recommended it too, but I haven't actually looked at a copy
> yet (stores I've looked in don't have it).  Haskell is the language
> that I guess interests me the most these days (in terms of learning
> new ones), but I haven't yet attempted doing anything with it.

It's a great book - I cetainly owe it the better part of my thesis about 
multi level specification for functional languages. If you want to 
understand type-systems, its a great comprehensive read.

Diez