A Tip for the Hangman - Allison Epstein

From the Book Jacket - England, 1585. In Kit Marlowe's last year at Cambridge, he is approached by Queen Elizabeth's spymaster offering an unorthodox career opportunity: going undercover to intercept a Catholic plot to put Mary, Queen of Scots on Elizabeth's throne. Spying on Queen Mary turns out to be more than Kit bargained for, but his salary allows him to mount his first play, and over the following years he becomes the toast of London's raucous theater scene. But when Kit finds himself reluctantly drawn back into the world of espionage and treason, he realizes everything he's worked so hard to attain—including the trust of the man he loves—could vanish in an instant.