Sentence:  I had written a number of short stories in the Twilight Zone and Alfred Hitchcock Presents vein, and a couple of fantasy novels that explored the premise of modernized <WSD>'Ringwraiths</WSD>' invading a 1986 Alabama high school." 
Meaning of the word marked with <WSD> tags:  Anyone who keeps a magical ring, and is enslaved thereby, and may also be rendered invisible and immortal thereby.