The Oxford Murders — Guillermo Martinez

IN THIS SPELLBINDING MYSTERY TWO MATHEMATICIANS MUST JOIN FORCES TO STOP A SERIAL KILLER

A visiting Argentine graduate student finds his landlady -- an elderly woman who helped decipher the Enigma Code during World War II -- murdered in the parlor of her quiet Oxford home. Meanwhile, his mentor, the renowned Oxford logician Arthur Seldom receives an anonymous note bearing a circle and the words "the first of a series." As the murders and the list of suspects begin to pile up and more symbols are revealed, the pair is drawn further into a calculated and deadly game. It would appear that someone is using these deaths to illustrate a mathematical theorem. And it is up to these two unlikely detectives to solve the puzzle before the killer strikes again.