Prime Obsession taught us not to be afraid to put the math in a math book. Unknown Quantity heeds the lesson well. So grab your graphing calculators, slip out the slide rules, and buckle up! John Derbyshire is introducing us to algebra through the ages-and it promises to be just what his die-hard fans have been waiting for. "Here is the story of algebra." With this deceptively simple introduction, we begin our journey. Flanked by formulae, shadowed by roots and radicals, escorted by an expert who navigates unerringly on our behalf, we are guaranteed safe passage through even the most treacherous mathematical terrain. Our first encounter with algebraic arithmetic takes us back 38 centuries to the time of Abraham and Isaac, Jacob and Joseph, Ur and Haran, Sodom and Gomorrah. Moving deftly from Abel's proof to the higher levels of abstraction developed by Galois, we are eventually introduced to what algebraists have been focusing on during the last century. As we travel through the ages, it becomes apparent that the invention of algebra was more than the start of a specific discipline of mathematics-it was also the birth of a new way of thinking that clarified both basic numeric concepts as well as our perception of the world around us. Algebraists broke new ground when they discarded the simple search for solutions to equations and concentrated instead on abstract groups. This dramatic shift in thinking revolutionized mathematics. Written for those among us who are unencumbered by a fear of formulae, Unknown Quantity delivers on its promise to present a history of algebra. Astonishing in its bold presentation of the math and graced with narrative authority, our journey through the world of algebra is at once intellectually satisfying and pleasantly challenging.

With this book Immanuel Velikovsky first presented the revolutionary results of his 10-year-long interdisciplinary research to the public, founded modern catastrophism - based on eyewitness reports by our ancestors - shook the doctrine of uniformity of geology as well as Darwin's theory of evolution, put our view of the history of our solar system, of the Earth and of humanity on a completely new basis - and caused an uproar that is still going on today. Worlds in Collision - written in a brilliant, easily understandable and entertaining style and full to the brim with precise information - can be considered one of the most important and most challenging books in the history of science. Not without reason was this book found open on Einstein's desk after his death. For all those who have ever wondered about the evolution of the earth, the history of mankind, traditions, religions, mythology or just the world as it is today, Worlds in Collision is an absolute MUST-READ!

The most academically credible case for alien visitation. Is the existance of civilisation on earth the result of contact from inhabitants of a planet in the system of the star Sirius prior to 3000BC? There are tribal cultures in present-day Africa whose most sacred and secret and traditions are based on this theory. Central to their cosmology is a body of knowledge concerning the system of the star Sirius that is astounding it in its accuracy of detail, including specific information only recently accessible to modern science. Robert Temple traces the traditions of the Dogon and three related tribes back 5, 000 years to the ancient Mediterranean cultures of Sumer and Egypt. He shows a knowledge dependent on physics and astrophysics, which they claimed was imported to them by visitors from Sirius.

This handbook collects, for the first time, the state of research on role-playing games (RPGs) across disciplines, cultures, and media in a single, accessible volume. Collaboratively authored by more than 50 key scholars, it traces the history of RPGs, from wargaming precursors to tabletop RPGs like Dungeons & Dragons to the rise of live action role-play and contemporary computer RPG and massively multiplayer online RPG franchises, like Fallout and World of Warcraft. Individual chapters survey the perspectives, concepts, and findings on RPGs from key disciplines, like performance studies, sociology, psychology, education, economics, game design, literary studies, and more. Other chapters integrate insights from RPG studies around broadly significant topics, like transmedia worldbuilding, immersion, transgressive play, or player–character relations. Each chapter includes definitions of key terms and recommended readings to help fans, students, and scholars new to RPG studies find their way into this new interdisciplinary field.

Cover -- Title -- Copyright -- Contents -- List of Illustrations -- Notes on Contributors -- Acknowledgements -- 1 The city and its regulations: Unexpected margins -- Part I Space and state regulation: The urban interstices -- 2 Markets and marginality in Beirut -- 3 The tremendous making and unmaking of the peripheries in current Istanbul -- 4 Resilient forms of urbanity on the margins? Al-Kherba: A vivid market in a damaged section of the medina of Tunis -- 5 Whose margins? Marginality, poverty and the moral geography of pre-Soviet Bukhara -- 6 On the margins of the city: Izmir Prison in the late Ottoman Empire -- Part II Diversity and moral policing: Making claims through marginalisation -- 7 'Texas': An off-centre district at the heart of nightlife in Odienné -- 8 The Manyema in colonial Dar es Salaam (Tanzania) between urban margins and regional connections -- 9 On the margins: Suburban space and religious deviancy in Jakarta and Kuala Lumpur -- 10 Ethnic differentiation and conflict dynamics: Uzbeks' marginalisation and non-marginalisation in southern Kyrgyzstan -- Index