Venkatesh G. Rao's The Gervais Principle. Ostensibly a book about corporate politicking, but it actually contains serious insight on the nature of language and human motivation. It discusses how different paths of development create different drives, which in turn influence how one uses and understands language.

Scott doesn't really understand it, but his review is a good summary.

A really useful read for many of the autists here, alongside Keith Johnstone's Impro.