This book is a limited edition, numbered and signed by the author Dr. Eric Johansson. It covers the history of Pickelhauben or spiked helmets used by the German military from the 17th to the 20th century. The hardcover book is in English, published by H.S.M. Publications in Missouri, United States. The Glittering Age:  German Headdress from the 17th to the 20th century (1650-1918).