[Franek Grabowski]

Hard question, to compare my book with the one written by pals.
Well, apart of obvious difference in language, there are some differences in approach to some issues, I have some more different accounts or reports, and my book provides a full list of combat and operational sorties with serials and codes tied up (only few missing!), for example. I would say, that if you are seriously interested in Skalski, you need both books.
One thing that I am fully certain - my book looks way better on a shelf!