So, who really killed Dumbledore??

That was the question a few years ago. It has since been discussed, theorized, and finally answered. The series is complete, the mysteries have been solved, the questions have been answered, the players have gone on to their various lives or to the hereafter.

Thus, I see no need to keep this book:

It's not necessary to my collection; it was really just a lark, a way to pass the time until the final book was released. It's now in the box of books to be taken to the library. It may be added to the collection or sold in the book sale, but either way it will be out of my house.

After all, I already know who did it!