I had never heard this story before about the Swedish nuclear worker who tested positive for radiation was what led to the discovery of the incident. I would love to know how they traced it back. This is fascinating and really incredible that the U.S.S.R. didn't feel any responsibility to share such information with Europe.

Amazing research and effort by the author. This is the Amazon link:

https://www.amazon.com/Chernobyl-01-Incredible-Nuclear-Disas...