Fatally poisoned by a rare radioactive isotope slipped into his drink, Russian emigre Alexander Litvinenko issued a dramatic deathbed statement accusing Russian president Vladimir Putin himself of engineering his murder. Alan S. Cowell, then London Bureau Chief of the "New York Times," who covered the story from its inception, has written the definitive story of this assassination and of the profound international implications of this first act of...

In 2006, eccentric Russian mathematician Grigori Perelman solved one of the world's greatest intellectual puzzles. For this feat, Perelman will be awarded a prize of one million dollars, and he will likely decline it. Gessen investigates his gripping yet tragic story of genius.