Now that the war is over, the souls of those whose sacrifices will be remembered and the innocent who lost their lives lie sleeping among the stars. As the survivors rebuild their lives, carrying their irreparable losses with them, Mr. Weasley, who witnessed the whole thing from the place closest to the fighting, recounts the war he lived through in this book. He also offers his perspective on the shortest-serving and most mysterious headmaster in Hogwarts' history...
The Daily Prophet
Actually, this is just a short review, supposedly told by Arthur.
The whole story's message is in the first sentence: Dumbledore and Snape are actually a lot alike.
Theme:
Is there anything else? I'm looking forward to the follow-up