I posted about the book in my online journal after I finished, so instead of typing up everything again, I'm just copy-pasting from there:
So, let's cover the whole Dumbledore/Snape thing first. First of all, I have to say that JKR crafted this book so artfully that both sides of the Snape case can be argued logically and intellectually, each with substantial backup and drawbacks. The way she wove the details leaves us all with our own guesses, but no solid answers. Beautifully done.
Sadly, Dumbledores death wasnt a big surprise to me. Ive believed for a while now that he would go in book 6 or 7, but I was still hoping to hang on to him for as long as possible, since hes always been a favorite. With all of the mentions of Harry being safe as long as Dumbledore is around, you know that there will eventually be a time when Harry is without him, and has to face things on his own.
I haven't made up my mind about all of the details yet, but I'm pretty sure that Snape and Dumbledore had an agreement for Snape to kill Dumbledore. I'm sure that DD knew about Snape's Unbreakable Vow to Narcissa, and rather than having Draco become a murderer, or having Snape die, Dumbledore chose this plan, possibly even having Snape agree to an unbreakable vow to him to carry through. That would explain the argument they had that Hagrid overheard.
Im pretty sure that the potion from the cave was going to kill Dumbledore slowly, and so having Snape kill him in front of the Death Eaters let Snape gain more credibility with them, as well as avoiding death because of his part in the Unbreakable Vow, while just speeding along the inevitable. The only thing I dont get, though, is why it wasnt possible to just dump out the goblets of the potion, instead of having to ingest them. It doesnt seem like they tried anything like that, but I may have missed it.
Next, if Dumbledore had died just from drinking the potion, Harry would have felt responsible, since (even though it was under Dumbledores orders), he was the one making him drink it. By having Snape kill him, Harry didnt have to blame himself.
I find it interesting that Dumbledore made it so that Harry couldn't move- obviously so that he wouldn't be seen and get hurt, most likely so that he wouldn't interfere with the plan, but possibly because he wanted Harry to bear witness to what happened?
Dumbledore didnt want Malfoy to become a murderer. Through his crying in the bathrooms, and agonizing over what he had gotten himself into all year, a spark of hope for him was visible. He is not one to kill lightheartedly, it was agonizing him, and he was emotional about it. However, if he had killed Dumbledore, he would have crossed that line, and would probably go on to kill again.
At least if it was arranged, Dumbledore died on his own terms- or as Harry had put it, the difference between being dragged into the arena to face a battle to death and walking into the arena with your head held high.
I find it interesting that Snape didnt say much to Dumbledore, which also leads to my belief that Snape and Dumbledore had an agreement. It seems like Snape would have otherwise said something, some sort of classic Villan About To Kill The Hero speech, or *something*, rather than only uttering the words of the curse. And when Harry was chasing after Snape and Malfoy, Snape just blocked Harry's curses, rather than attacking back.
Dumbledores choice to reveal so much to Harry this year, and to start the private lessons, leads me to believe that he knew his end was near, and he wanted to prepare Harry as much as possible for the time when he wouldnt be there.
Part of the reason I believe Snape is actually on the side of the Order is that we see all of his explanation to the Death Eaters, about why he acted in certain appear good while really being evil. What is left as a big mystery, though, is Dumbledores proof that Snape is instead appearing evil, while working for good. Something about leaving information out is usually a signal in JKR books that that information is extremely important. Why would she reveal that hes having these talks with Narcissa & Bellatrix at the very beginning of the book and ruin the shock of him being evil and killing Dumbledore at the end if he really is evil?
The main argument I have towards Snape possibly being evil stems from this book's focus on love. It is often mentioned how important love is, but Snape seems to be the only person on the "good" side (if he is) who is without love. I know there are a lot of theories that he loved Lily, but I'm hoping there's some deeper explanation about Snape and why he is the way he is in the future.
Im wondering if this will follow the framework of the other great stories of our time in which the mentor dies, only to come back in some more powerful form to help out in the end. Obi-Wan returns as a ghost, Gandalf comes back as Gandalf the White. The whole connection between Dumbledore and phoenixes, and the possible phoenix in the smoke at the funeral (and the fact that he burst into flames in the first place) all point towards a "rising form the ashes" kind of thing.
I doubt theres any coincidence at all that Harry got Snapes old potions book. My guess is that Dumbledore (or someone) knew that he needed to know these things, but that he was never going to learn them from Snapes class. However, by presenting the information in a form that was intriguing to Harry, and a little bit dangerous, Harry learned with ease.
So, are Dumbledores old memories still accessible in the Pensieve? I imagine Harry could learn a LOT there.
If you are at all familiar with tarot cards, you probably found the fact that the scene with Dumbledore and the Death Eaters took place in and leading up to the tower interesting. (ie the Tower Card)
So, Harry isnt planning to go back to Hogwarts next year, and yet Ron & Hermione are talking about sticking with him- I can see Ron dropping out, but not Hermione. So how is that going to work out?
I've been wondering if Harry's scar is somehow one of the horcruxes, and was surprised to see some other people online had the same idea. I'm pretty much giving up the theory though, because although Harry seems to have taken in some of Voldy's abilities, I don't think there's any of his soul in there.
R.A.B = Regulus Black, as pretty much everyone seems to agree on. My best guess is that the horcrux that Regulus had is now in the Black house, and therefore Harrys property. After coming to this conclusion, I read somewhere where someone had found mention of a locket in the Black house that nobody could open. Aha! It does seem strange that JKR threw in such obvious initials, though, so I wouldn't be surprised if it ended up *not* being Regulus. I think it would make for more interesting story if it were, though.
Off on a whooooooooole other topic- Whats up with the Lupin/Tonks thing? Seems like such a weird, unlikely couple to me, but probably just because I love Lupin, and dont really like Tonks. Same thing with the Bill/Fleur relationship! What does Bill see in her? Just...why?
And thus ends my poorly organized list of thoughts. I recommend a read-through of this post, which I found interesting. I'll add more links as I come across them.
First Re-read Additional Notes:
(I get incredibly nerdy and nitpicky here. You've been warned)
-The man in the painting in the muggle Prime Minister's office is described as "froglike". Umbridge was always described as toadlike- are they possibly related? And is the man a Prime Minister who was a wizard? Otherwise, who is he, and how did his painting get there? (We can assume the why-for communication and a bit of spying, but the who and the how make me wonder.)
-Just an observation, but the PM seems particularly freaked out by dragons. He reacts visibly to both mentions.
-Fudge says there will be an inquiry into Sirius's death. Some answers, maybe?
-If the dementors are gone, who/what is guarding Azkaban? And when Fudge talks of the dementors "breeding", does he mean that in the traditional sense, or a sort of asexual multiplication?
-Wizards don't get to vote for the Minister of Magic?
-JKR certainly uses a lot of similar R-names (Remus, Rubeous, Regulus, Rufus)
-When Bellatrix apparates in chapter 2, the pop that it makes is louder than Narcissa's. Does this mean anything?
-Why does Snape live here? Does he normally go there in the summer, or just this time? How does Narcissa know where he lives? Why is Wormtail living there?
-Snape asks "You think that he (Voldemort) is mistaken? Or that I have somehow hoodwinked him? Fooled the Dark Lord, the most accomplished Legilmens the world has ever seen?" This points out that one way or another, Snape is fooling an incredibly powerful wizard. Either Voldemort or Dumbledore is being decieved- I'd like to believe it's Voldemort.
-Snape says that Dumbledore's greatest weakness is that "he has to believe the best in people". "Has to" seems like an odd choice of words- Does Dumbledore really *have* to? Probably just a technicality, but it caught my attention.
-When Bella and Narcissa are at Snape's, does Snape really know the plan as he says he does, or is he just fishing for information? Snape mentions that if he can help Draco with the plan, he will be able to stay at Hogwarts as a spy- but if he's supposed to be there spying on Dumbledore, what would the point in staying to spy after the plan is carried out be?
-Scrimgeour is described many times as being lionlike. Is he related to Gryffindor, perhaps?