This study puts medieval chronicles, Norse sagas and Muslim accounts alongside more recent research into ritual magic, genetic profiling and climatology. It includes biographical sketches of some of the most famous Vikings, from Erik Bloodaxe to Saint Olaf, and King Canute to Leif the Lucky. It explains why the Danish king Harald Bluetooth lent his name to a twenty-first century wireless technology; which future saint laughed as she buried foreign ambassadors alive; why so many Icelandic settlers had Irish names; and how the last Viking colony was destroyed by English raiders. Extending beyond the traditional 'Viking age' of most books, A Brief History of the Vikings places sudden Scandinavian population movement in a wider historical context. It presents a balanced appraisal of these infamous sea kings, explaining both their swift expansion and its supposed halt. Supposed because, ultimately, the Vikings didn't disappear: they turned into us.