Tonie Holt & Valmai Holt 
Ypres Passchendaele [PDF ebook] 

A guide to these historic Belgian landmarks of the First World War, with maps and photos. Covering the Battles of Ypres, including the notorious Passchendaele, this guidebook takes readers on a historic trip through some of the best-known and most important sites of the area in Belgium. Part of a series of guides, it serves as an introduction to the historic battlefields, whether on the ground or from an armchair. Included are selections from the Holts more detailed guides of the most popular and accessible sites, many full color maps and photographs, and detailed instructions on what to see and where to visit.