Edited sentence: " As aforementioned, Chkhartishvili "prefers to work with historical material" and his "tsarist-era detectives are positive heroes, while political terrorists are the real evildoers.As Boris Akunin, Chkhartishvili has been called the "undisputed champion" of Russian crime fiction given that he "has written more than a dozen crime novels and has been widely appreciated by discerning readers.and has been translated into many languages