Thirty genuinely true, cross-checked facts about cities — the strangest thing humans have ever built — spanning Urban Nature, Streets & Signals, Building the City, Underground, Maps & Movement, Myths of the City, Heat, Light & Air and Indian Cities. Inside: why the word ‘jaywalking’ was invented deliberately to shift the blame for road deaths onto pedestrians, why the London Underground map is spectacularly inaccurate — and why that is exactly why it works, and why the famous ‘one rat per person’ statistic was simply made up. No myths, no filler — every fact verified against independent sources.