The story is mainly about a journey to find and destroy horcruxes witch are objects with parts of Voldemort's soul. Harry and his friends most find them all to kill him. On the journey many dangers arise and it puts a real test to their friendship. The book is so well written you can actually believe there are such things as magic and wands. The three friends all make the book special. Ron, who's sarcastic and funny, but doesn't really handle dangers very well. A good example of this is when he bails on his friends because the death eaters are after them. Hermione is the smart one, and always has the right answer and spells. In the book she often foresee dangers and get them out of trouble. Harry Potter, however, is the brave one. He's good at keeping his head cold in a dangerous situation and is immensely loyal to his friends.He shows a great example of this when he goes to his own death to save everybody else.
This book is very different from the first books in the series. Especially the first three books. In this book there are many things happening at ones and sometimes they use hard words and different dialects, like Hagrid who talks very wide. This can often make it hard to keep up. The first books however where far shorter and more like children books. In one way I find this very interesting, because it's like Harry Potter grows with the books. He's only eleven years old in the first book, but in the last he's seventeen.
The main part of the book I would say is the battle on Hogwarts. Everything ends there and every secret is confided. The final battle between Voldemort and Harry and many loved ones in earlier books dies. For example Fred, who is one of the two hilarious twins in the book. They always do something against the rules. The truth about Dumbledore and Severus Snape is also revealed. In the end, that's the best part of the entire series.
To be honest, I didn't like the ending very much. I didn't really think it gave me an answer on how they all ended up and how they we're doing now that it was all over. But in a way I can understand that, because nobody wanted the big adventure of Harry Potter to end. Also, the ending is the hardest part. What I liked about it, however, was how they were all gathered on the train station, King's Cross, to say goodbye to their kids. It gives an impression that it's not really over. New adventures begin for their children.
In my opinion this was the best book in the Harry Potter- series. All the secrets and mysteries are finally answered. I would recommend it heartedly. But it would probably be a good idea to read the first books in the series first.