She flipped to the next section: On the nature and magics of Possession. That was a bit more promising. She certainly had not heard this topic discussed in Defense, nor had she read anything about it in the main library. And it was dodgy enough that it could have been what Riddle had mentioned to Slughorn that one night. Hermione perused the section intensely, her alertness diminishing as she became engrossed in the book. It was rather appalling reading, to tell the truth—possessing someone, unlike the Imperius Curse, was a form of Dark Magic that could not be fought off by the victim.