Richard Earl is Director of Undergraduate Studies in the Mathematical Institute, Oxford University. He has taught topology at undergraduate and graduate level, as well as presenting the topic to secondary school students. Richard is the author of Towards Higher Mathematics: A Companion.
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Four decades. Four cases. One solution. From the plains of Afghanistan to the alleyways of Victorian London, join Sherlock Holmes and Dr John Watson in a quartet of astonishing new investigations which span their lifelong friendship and beyond...