LCSH, SKOS and lcsh.info
Von Totanes sent this one over: "LCSH, SKOS and lcsh.info: the entire LCSH has recently been uploaded at lcsh.info, which is an experimental service that aims to "encourage experimentation and use of LCSH on the web."
It's far from being an ebook that non-techies like me can use easily, but if you understand what Simple Knowledge Organization System (SKOS) is all about, you might be able to make it work for you and develop
new ways of using LCSH online in non-traditional ways, aside from not having to buy a new set every few years. More...