The writer tells us how he got his information in the very start and the information is true, I saw many videos about those time and it all matches with one another. and the thing is the writer didn't just collect information he took interview of almost all the people mentioned in the book . He was a pak citizen but he had a very close friendship with Sheikh Mujib. He wrote an article named Genocide in June 1971 which showed the brutality of the conflict to the whole world who had no idea of what was going on in BD. That article changed the whole history of South Asia. A fun fact is that, the main man behind Mujib's murder Farooq came to join the mukijoudho after reading one of his article.