Oh, I'm sorry. I always read a few different books at once (something in audiobook, something from phone, something in paper, for work or for pleasure, demanding or requiring no focus at all) and I'm never sure which one was already mentioned here.
By the way - it's quite interesting reading. I'm not very impressed with the story, but it has nice historical background and shows me that I should read a bit more about 1920 war. The book suggests that Piłsudski (often mentioned as an author of our glorious victory) is also responsible for terrible situation we were just before Battle of Warsaw.