The story of the Czechoslovak resistance to German annexation and occupation during World War Two is a pretty bleak one - the Gestapo did a very effective job of rooting out almost the entire organization. One of the most notable actions taken was the assassination of Reinhard Heydrich by two SOE-trained and equipped paratroopers, Jozef Gabčík and Jan Kubiš on May 27, 1942. Six different movies have been made about this assassination, and the most recent one in 2016 ("Anthropoid") is in English, and extremely well done.

I had a chance to visit Prague recently, and made a point to visit the church where the final gun battle between these two men (and several other operatives) and German forces - it's quite a memorable sight. In addition, I was given a copy of a book about the resistance movement and the lead-up to and aftermath of the Heydrich assassination that was produced by the Czech Ministry of Defense. It does not appear to be available for sale, but it can be viewed and downloaded in PDF format here:

https://www.army.cz/images/id_7001_8000/7419/assassination-en.pdf