I loved it! It is my favorite book of the series. When I saw the cover, and the green light, I figured that meant that either Dumbledore or Harry would die and since Harry couldn't die (at least yet!) I thought it meant Dumbledore. Which is consistent with other mythological stories, i.e. the hero losing his mentor/father and is forced to grow up to face the final trial on his own.
Okay, here's my theory:
- I think Snape made an Unbreakable Vow to Dumbledore to follow his orders, which is why Dumbledore trusts him so much. Dumbledore wasn't pleading for his life, he was pleading for Snape to do what he had to, else Snape would have died. Remember too in The Order of Phoenix, Dumbledore tells Voldemort that there are worse things than dying and that if Dumbledore was struck down he would become more powerful than Voldemort could imagine. I think if Snape was following Dumbledore's orders and is not really a Death Eater, it would explain why he was so furious at Harry for accusing him of cowardice. Despite Snape's fascination with the Dark Arts, I think he really wants nothing to do with Voldemort and was providing Dumbledore with information about him, his movements and the identities of the Death Eaters.
- I think RAB is Regulus Black, Sirius' brother who was killed by the Death Eaters years ago. Remember the locket they found at Grimmauld Place? That is the Horcrux. Harry just doesn't realize it yet. I think the final Horcrux though is not Nagilius (Voldemort's snake), but Harry himself. I think Harry is a direct descendent of Gryffendor (his parents lived at Godric Hall). I think that when Voldemort tried to kill Harry, he inadvertently gave up part of his soul, which is why Harry could "feel" Voldemort's presence; part of his soul was inside Harry. The scar is the final Horcrux. I think this is why Dumbledore was telling Harry that love is more powerful than spells and jinxes; Voldemort doesn't understand love and is actually repelled by it. I think this is how Harry ultimately defeats, and kills, Voldemort.
- I think there really is a spy in the Order of Phoenix which is why Dumbledore told Harry to tell no one except for Ron and Hermione. I think he wanted Harry to have only his friends go on the quest for the Horcruxes but that Dumbledore wasn't certain who the real betrayer was. I think he knew that Harry would need their help.
Hermione is always telling Harry and Ron that you can't apparate and dis-apparate inside Hogwarts. Dobby and Kreacher did several times with no explanation. Anyone know why?
I think it was in Goblet of Fire that Rowling said house elves have a magic all their own and that the spells of Hogwarts don't always apply to them.