The L.J. Smith books with unexpected conclusions that are published more than ten years after the original series was published. EXAMPLE: the three books concluding The Vampire Diaries; Strange Fate; and the sequels to The Forbidden Game and The Secret Circle that L.J. Smith has promised to begin writing.
Person 1: OMG! TWILIGHT CAME OUT WAAAAY BEFORE THE VAMPIRE DIARIES!
Person 2: No, it didn't. The original books were published in 1991. You're talking about the Smith Sequels, idiot.