Books are not sacred objects. The Jedi Prince novels especially so.
Not sacred, no, but if there's someone out there that would enjoy them, why not do something with them to give them an opportunity to get them? Like the earlier suggestions about donating them to Goodwill or the like. It's not really analgous to newspapers either, because as was said, newspapers are created with the intent to be disposable by what they are; they're not meant to be worth anything beyond the day in which they report the news.
I mean, perhaps the Jedi Prince books are trash, but some people like trashy fiction, and I'd never burn one when there's the chance that someone else out there might get some fun out of getting and reading one.