Wondering if any of the gang here have a copy of this book, by the Norwegian historian Oyvind Flatnes. Oyvind has an MA in medieval history from the University of Bergen -- and also maintains svartkrutt.net, a popular Scandinavian Web site for all things black powder. He is also a competitive shooter of various BP firearms. If you have or have read Oyvind's book, what did/do you think of it?
https://www.amazon.com/gp/product/1847975933/ref=ox_sc_act_image_1?smid=A2LV0SRZBF8L1P&psc=1
https://www.amazon.com/gp/product/1847975933/ref=ox_sc_act_image_1?smid=A2LV0SRZBF8L1P&psc=1