I similarly recall that there was a Total Recall novelization, written by Piers Anthony, and of course Total Recall was based on Dick's story "We Can Remember It For You Wholesale". But this was originally a short story rather than a novel, of course.
Note that Yorba Linda is perhaps (and might have been more so in the 70s) best known as the birthplace of Richard Nixon.
What if something was an explicit reference to the original thing? Like if you had a science fiction TV show where there was a space station named "Minas Tirith", and it's explicitly noted that it's named after the Tolkien creation?