If you like well-researched historical fiction and want to learn more about Calvin, you might want to check out Douglas Bond's new book, The Betrayal: A Novel on John Calvin (P&R, 2009)
As Tony Reinke explains, "The novel is written from the perspective of a (fictional) confidant, turned betrayer of Calvin, named Jean-Louis Mourin."
Tim Challies reviews it here, and Tony provides an excerpt.