yeah, thanks for the link, davej. I've played myst and beat it without a guide, but couldn't for riven - that is a difficult game and it still remains to be finished.
btw, I read the myst book (Book of Atrus..I believe, the other is Book of Catherine) and it's 2/3 as good as the hobbit so that is still pretty damn good. read it sometimes; authors are randy and..something...miller (the two brothers who designed myst).