The World of Tolkien: Seven-Book Boxed Set is a comprehensive seven-volume paperback collection written by David Day, a best-selling author and Tolkien scholar with four decades of research on Middle-earth. Published by Thunder Bay Press in November 2023, this 1,792-page set is a must-have guide for fans of J.R.R. Tolkien's legendary fantasy world.

The set includes seven individually bound books: An Atlas of Tolkien, The Battles of Tolkien, The Dark Powers of Tolkien, A Dictionary of Tolkien, The Heroes of Tolkien, The Hobbits of Tolkien, and The Ring Legends of Tolkien. Together they cover the full breadth of Middle-earth — from an A-to-Z dictionary of Tolkien's vernacular and a geographical atlas, to detailed histories of the Rings of Power, the great battles, dark forces, legendary heroes, and the Hobbits who started it all. More than 200 black-and-white and full-color illustrations bring the pages to life. This work is unofficial and is not authorized by the Tolkien Estate or HarperCollins Publishers.