Book excerpt: An all-inclusive guide to key concepts and details about Dan Brown’s novel Inferno—featuring black-and-white illustrations. Go deep into the provocative and always compelling world of Dan Brown’s novel, Inferno. Delivering crucial background on the characters, codes, symbols, secrets, and setting of the novel, Inferno Decoded also offers a wealth of fascinating details about the historical and cultural background and the questions it raises. As in Michael Haag’s previous bestseller, The Rough Guide to The Da Vinci Code, the author illuminates the life and work of Dante Alighieri and the world of medieval Florence. Also included: an overview of Dante and his work, along with the other themes of Brown’s thriller; a guide to its sources and Tuscan locations; and a look back at the earlier career of Brown’s hero, Harvard Professor of Symbology, Robert Langdon.