Polish, Paperback (2015)
Truely BEAUTIFUL book about the fortifications of Malbork in Poland (German name: Marienburg). The book describes ca. 150 fortifications.
Polish, Paperback (2020)
The fifth and last volume in the series about the fortifications of the Vistula Pomerania. Lavishly illustrated guide with 21 routes to 100 objects. Illustrated with 950 photos and 300 drawings, plans and maps.