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  Adventures in Group Theory: Rubik's Cube, Merlin's Machine, and Other ... - David Joyner - Google Books

  https://books.google.de/books?id=iM0fco-_Ri8C

  This updated and revised edition of David Joyner’s entertaining "hands-on" tour of group theory and abstract algebra brings life, levity, and practicality to the topics through mathematical toys.Joyner uses permutation puzzles such as the Rubik’s Cube and…

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  The Word at War: World War Two in 100 Phrases - Philip Gooden, Peter Lewis - Google Books

  https://books.google.de/books?id=TwlpBAAAQBAJ&pg=PT27

  War words have embedded themselves in our collective psyche; British politicians are fond of invoking the 'Dunkirk spirit' whenever the country is faced with major crisis or even minor adversity, and Roosevelt's famous description of Pearl Harbor as 'a…

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  Inside Echelon | Telepolis

  https://www.heise.de/tp/features/Inside-Echelon-3447440.html

  The history, structure und function of the global surveillance system known as Echelon

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