An excellent book! Herr Jager fills in an important area missing in the field of Artillery. His work on the known and many lesser known and rare pieces of Germany Artillery before and during WWI does justice on the subject that should please almost everone even Ian Hogg. He has included many rare photos of field guns and other equipment that I have never seen in books in the United States. The book has descriptions of each piece and almost all pieces of artillery described has at least one photo to accompany it. The book is easy to read and follow and should be included in anyone's collection on Artillery. The only mistake I found was the misidentification of one photo on page 205 which should read 15cm Kanon 16 by Krupp. If you are interested in Artillery then this is a must have book for your collection.