"West of the Mountains, East of the Sea: The Map of Tolkien's Beleriand" by Brian Sibley and illustrated by John Howe is a hardcover book published by HarperCollins. This book is a comprehensive visual guide to the iconic fantasy world created by J.R.R. Tolkien, focusing on the detailed topography of Beleriand. With stunning illustrations and insightful commentary, readers can explore the intricate landscapes and histories of Tolkien's fictional realm, making it a must-have for fans of Middle-earth and fantasy enthusiasts alike.