"The Silmarillion" by J. R. R. Tolkien is a classic fantasy book that was first published in 2013 as a mass-market paperback by HarperCollins. The book, edited by Tolkien's son Christopher, continues the epic saga of Middle-earth, expanding on the lore and legends of the beloved author's earlier works. Written in English, this trade paperback edition is a must-have for fans of Tolkien's fantasy world and those looking to delve deeper into the mysteries and adventures of Middle-earth.