I've had a little bit of a break from Harry Potter, as reading five of the novels (and watching the corresponding films) can be quite exhaustive, especially the angst-laden The Order of the Phoenix. The sixth book is noticeably more cheerful in terms of Harry's outlook, but that vibe of angst doesn't go away. As always, spoilers ahead.
Before I start - Romance alert! Eugh. Yeah, The Half-Blood Prince does have a series of subplots revolving around the romantic interests of some of the characters, and Rowling's sometimes problematic treatment of her female characters rears its head again. Ginny is bouncing between boyfriends, Ron is trying to be protective of her whilst dealing with girls he's interested in (and they begin to get interested in him), Hermione is trying to wrestle with her feelings for Ron, Harry suddenly begins to be interested in Ginny (it could have been a clever reversal of Ginny crushing on Harry, but Rowling goes almost Freudian with it) whilst struggling to deal with Cho's rejection of him, Bill Weasley is engaged to Fleur (from The Goblet of Fire, her 'Allo 'Allo French accent still present), Fleur's presence turns Hermione, Mrs Weasley and Ginny into extremely catty people, etc., etc., etc. It's a big mess, and the way it's handled doesn't help. Many of the girls come off as jealous and spiteful, whereas the boys have more interest than they can seemingly deal with. It feels like just another way in which Rowling puts down her female characters - if they can't have physical flaws then they must act in flawed ways that relate to their sex or gender. Would Luna or Hermione have their behaviour put under so much scrutiny within the books if they were male? These problems are further compounded by the suddenness of the changes - I felt as if Rowling had realised she had just two books left of Harry's tale (as this is the penultimate entry) and that certain content had to be put in.
We're introduced to a character as "a tall black boy"
(reminiscent of the "tall black girl" description from the fifth book), and this stands out as it's one of the few - if not only - times a character's race is implied via a description. Other characters of a racial minority generally have names that work as racial identifiers (e.g. Cho Chang and the Patil sisters). Towards the end of the book I found another jarring gender-based comment (I am ignoring the idea of Crabbe and Goyle using the Polyjuice potions to turn themselves into girls as disguises for a dozen reasons), this time from Professor Slughorn. When faced with the idea of closing Hogwarts, it's implied that keeping the school open is the right choice but closing it is the wrong one, so when Slughorn backs the idea of closing it's implied he is in the wrong to do so. He asks the other professors if mothers will allow their children back after all that's happened. Not parents, but mothers. I find this comment particularly odd because of the number of characters who have lost their mothers in the series - Harry, Luna, Neville (in a way), etc. - or those who look negatively at theirs or who don't know them (Hagrid, the discussions about Tom Riddle's past, etc.), so for mothers to be singled out is not a positive thing, not least because it implies that mothers are over-protective.
At one point Rowling actually calls out herself on reusing a plot point - Harry has a used textbook that contains improved potions recipes as well as hand-crafted spells, and he blindly forges ahead and uses them. This is picked up by Ginny not long after this discovery and she chastises Harry for using it, but after some light testing from Hermione, the book is deemed safe. As might be predictable, the book gives Harry the tools that get him in trouble later on. Other prominent plot points in the book are often moving down predictable paths, but thankfully there are moments where unexpected and interesting things happen. Except that one about the book very near the end. Oh dear. Talk about hamfisted.
Well, what's good? I'll just put that in the summary. Seriously.
Summary: You know, I'm hard pressed to pick out any one thing I like about this book. Ginny and Luna, two of my favourite characters, aren't really shown as anything except accessories, though they have their moments. I think that actually typifies this book - the memorable good moments are exactly that. Moments. They're one-liners or they're small details, or they're the way Rowling moves from one moment to the next. It feels like things are building up, but less like a skyscraper and more like a Jenga tower. There's holes in the plot, there's leaps of logic, there's a dozen things you can pull out, analyse and find poor. And yet Rowling's greatest strength is in making you overlook (but she can't make you forget) when this happens. I devoured these 600-odd pages in a couple of days and I am left wanting to see how this ends.
I suspect it has something to do with nargles...
Favourite Moment: Harry and Ron's one-liners to Snape during various Defence Against the Dark Arts classes.
Least Favourite Moment: Harry getting a bit angsty and shouty again.
Improvements From Earlier Book(s): It's not The Order of the Phoenix.