For more mind altering fiction from Egan, tackle his "Orthogonal" books, which posits a universe where the speed of light is not a constant and builds on that (and Riemannian Geometry). If you just want the physics behind the books, see his website [ http://www.gregegan.net/ORTHOGONAL/ORTHOGONAL.html ]
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A BOOK SERIES · 2006–2026 SAMPLE
Orthogonal
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THE WORD OF MOUTH
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