Someone else may have already come up with this interpretation, but I just wanted to get a prediction posted before the last chapter comes out.
Voldemort most likely had turned the diary of Roger Bacon into one of his horcruxes. The book was described as unusually durable, and it was given to Harry at a point in the story before Voldemort acquired the Resurrection Stone, so horcruxes would have worked only by touch. Needless to say, it was to his advantage to have one in Harry's possession, to be able to potentially take over the body of Tom Riddle v2.0 if ... (read more)
Word of god already said the diary wasn't supposed to be important at time Voldemort gave it to Harry. So it was probably just enchanted to be unusually durable.
The likelihood of this theory is definitely boosted by "Hermione's" last words, as that's exactly the message that a disguised McG would want to give him.
Someone else may have already come up with this interpretation, but I just wanted to get a prediction posted before the last chapter comes out.
Voldemort most likely had turned the diary of Roger Bacon into one of his horcruxes. The book was described as unusually durable, and it was given to Harry at a point in the story before Voldemort acquired the Resurrection Stone, so horcruxes would have worked only by touch. Needless to say, it was to his advantage to have one in Harry's possession, to be able to potentially take over the body of Tom Riddle v2.0 if ... (read more)