World War I was the first war in which the pictorial full colour poster played a major propaganda role. The era's greatest illustrators and fine artists contributed their energies to produce hundreds of great and classic posters. A surprising number of these posters have survived and many are still found in attics and barns today. This book illustrates over 450 World War I posters that were produced in the United States, Canada, and Europe. Many great classics are featured, but numerous less dramatic posters are also included which still have much historic importance. The text discusses the history of World War I posters and how they were designed and printed by colour lithography. The book also devotes considerable attention to issues relevant to collectors: condition, conservation, display, and value. World War I posters are increasing in recognition and value as new collectors discover the beauty and power of these historic artefacts.