
Create plausible and realistic languages for role-playing games, fantasy and science fiction, movies or video games, or international communication.
The community is also fascinating, with folks spending passionate decades on making languages - ex: ithkuil.
I used to have that book... I didn't think it was very good. I wanted to learn more about the various conlangs, but instead the author mostly focused on their creators, and then especially their idiosyncrasies and quirks.
For those who want to know more about conlangs, I would recommend "The Language Construction Kit" by Mark Rosenfelder.
[1] http://www.zompist.com/kit.html
[2] http://www.amazon.com/Describing-Morphosyntax-Guide-Field-Li...
http://www.amazon.com/Language-Construction-Kit-Mark-Rosenfe...
See also his website: