I am warning those who have not finished the series . . . and there must be still a few of them by now. . . that there are spoilers ahead. I have just finished the last book . . . having spent an enjoyable evening with it thanks to Sam’s Club and an indulgent wife. I am done with Harry Potter and enjoying the literary aftertaste the way one enjoys a fine meal almost as much after it is done as when it is being consumed . . . though it is a bit sad that the series is...