Once again J. K. Rowling places us at Hogwarts with a new and exciting challenge. The characters remain just as believable as ever with the addition of several new characters with international origins.
The ending is perhaps the most significant ending thus far in the series. While not giving any details away, this book will most definitely cause new readers to passionately seek out the fifth book. Once again the story ends on a twist that we didn't see coming. Overall, a great addition to the series and a big step forward in the story's progression.