The book ‘Our Business is Death’ is the most complete history of the Wagner PMC and its owner Yevgeny Prigozhin. The authors are journalists Ilya Barabanov and Denis Korotkov. Both began researching Wagner in the mid-2010s, when almost no one knew about this group. They told how the private military company operated in Ukraine, Syria and African countries. They proved that the PMC belongs to ‘Putin's Chef’ Prigozhin. They talked to the mercenaries themselves, their loved ones and relatives. They gained access to the group's unique internal documents, which allowed them to thoroughly reconstruct the details of their operations and crimes.