I know this is probably a very unoriginal answer, but honestly, I'm thankful for Harry Potter and the Order of the Phoenix. To be honest, I'm thankful for all of the books, but I think I got the most out of the fifth.
Harry Potter and the Order of the Phoenix by J.K. Rowling
There is a door at the end of a silent corridor, and it's haunting Harry Potter's dreams. Why else would he be waking in the middle of the night, screaming in terror?The fifth Harry Potter book showed me that even when you're in a completely crappy situation where nothing seems to go right, you can still carry on. After all, if Harry was surviving at a school where everyone hated him, his parents were dead, and he could barely have contact with the one person he was related to, all while he had a psycho after him? If he could survive with that, then I could survive everything I was going through. The fifth Harry Potter book taught me all about endurance and perseverance, and it showed me what real friends are like. It also showed me that not everyone is perfect - there were times when Harry would just snap at his friends for no reason. I'm extremely thankful for everything this book taught me. (Though I'll admit, Sirius' death still makes me angry -_-)
Here are just a few of the things on Harry's mind:
• A Defense Against the Dark Arts teacher with a personality like poisoned honey
• A venomous, disgruntled house-elf
• Ron as Keeper of the Gryffindor Quidditch team
• The looming terror of the end-of-term Ordinary Wizarding Level exams
. . . and of course, the growing threat of He-Who-Must-Not-Be-Named.
In the richest installment yet of J.K. Rowling's seven-part story, Harry Potter is faced with the unreliability of the very government of the magical world and the impotence of the authorities at Hogwarts.
Despite this (or perhaps because of it), he finds depth and strength in his friends, beyond what even he knew; boundless loyalty; and unbearable sacrifice.
[As a side-note, Blogger refuses to post my RAK wrap-up post. I may end up posting it on tumblr.]