I have read it for a long time but I finally found the time to write a short review about it.So, let’s refresh, in "The Half-Blood Prince", Dumbledore dies and we all hated Snape for it! Harry vowed to kill him.
Now, in the final installment, things were up to a good start. Hogwarts is now ruled by the death eaters and Snape is the headmaster! Voldemort decides to kill Snape because he thinks that Snape is the owner of the Elder Wand(the most powerful wand in the planet). Snape had seen Harry when he was about to die and gave him something that came out of his head. Hurriedly, Harry went to headmaster’s office and put it in the Pensieve. Inside were Snape’s thoughts and it reveals many things. I won’t reveal the spoilers but I myself was really shocked when I read about it!
Finally, Harry killed Voldemort because Snape wasn’t the true owner of the elder wand, it was Malfoy! Draco Malfoy owned the most powerful wand in the universe without knownig it and Harry disarmed him so technically he was the owner of the elder wand.
In the epilogue, Ginny and Harry were married and they had three kids, Rose, James and Albus Severus(sounds weird lol).
read it for yourself guys!