walter said:
> Last time I checked there weren't any
> available through Gutenberg at the
> pretty basic level they are needed.
open-source textbooks are an idea whose time has come.
there are now various entities gearing up to pursue them.
i'd suggest that you take a good look around cyberspace.
even if they aren't here yet -- and i don't think they are --
they will be soon, perhaps very soon. best of luck to you!
-bowerbird