But a company called Nocturnal has acquired the rights, put together a kickstarter to reprint it (with more illustrations etc.), and it's already fully funded. There are still some stretch goals thought, so some time to get in on the act if you're interested.
The book is going to be available for a limited period, since they only have a short-term licence from King Features (who publish the Prince Valiant comic strip). If you're interested in one of the classic story telling games it's well worth a look
Although I already own the original edition, I'm very tempted to buy this. And no, I'm not being given any incentives to plug this one!