2007: John Derbyshire, Prime Obsession: Bernhard Riemann and the Greatest Unsolved Problem in Mathematics (Joseph Henry Press, 2003).[1][2] The main subject of this popular-audience book is the Riemann hypothesis, concerning the location of the zeros of the Riemann zeta function, and its application to the distribution of prime numbers.[3][4] Due to a miscommunication, Derbyshire missed the award ceremony.[5] 2008: Benjamin Yandell, The Honors Class: Hilbert's Problems and Their Solvers (AK Peters, 2002).[1] This book intertwines the stories of the solutions to Hilbert's problems with the biographies of its solvers.