In Code Breaking , Rudolf Kippenhahn offers readers both an exciting chronicle of cryptography and a lively exploration of the cryptographer’s craft. Rich with vivid anecdotes from a history of coding and decoding and featuring three new chapters, this revised and expanded edition makes the often abstruse art of deciphering coded messages accessible to the general reader and reveals the relevance of codes to our everyday high-tech society. A stylishly written, meticulously researched adventure, Code Breaking explores the ways in which communication can be obscured and, like magic, made clear again.

    Here is the definitive guide to the geography of Middle-earth, from its founding in the Elder Days through the Third Age, including the journeys of Bilbo, Frodo, and the Fellowship of the Ring. Authentic and updated -- nearly one third of the maps are new, and the text is fully revised -- the atlas illuminates the enchanted world created in THE SILMARILLION, THE HOBBIT, and THE LORD OF THE RINGS.Hundreds of two-color maps and diagrams survey the journeys of the principal characters day by day -- including all the battles and key locations of the First, Second, and Third Ages. Plans and descriptions of castles, buildings, and distinctive landforms are given, along with thematic maps describing the climate, vegetation, languages, and population distribution of Middle-earth throughout its history. An extensive appendix and an index help readers correlate the maps with Tolkien's novels.