In this "follow-up" to The Silmarillion and LOTR you find a literal treasure chest of knowledge concerning tales of Middle Earth. The Tale of the Children of Hurin is one of the best stories I have ever read, the essays on the Istari and the Druidain reveal two of the mysteries in LOTR, and The Battle of the Fords of Isen and Cirion and Eorl will give you good insight on the troubles of Gondor and Rohan in the Third Age. It also contains two rarely mentioned parts of LOTR; one being Aldarion and Erendis, a tale concerning a King of Numenor, and the other tells of the entire hunt for the Ring as seen by the enemy. I recommend this book to any Tolkien fan. You will read this book time and time again and simply revel in the quantity of information it gives you.