QED: The Strange Theory of Light and Matter

Richard Feynman explains quantum electrodynamics for general readers, in four lectures originally given at UCLA. He describes how light and matter interact using arrows that are added and multiplied to give probabilities, instead of equations. With that simple tool he accounts for reflection, refraction, diffraction, and the behavior of electrons and photons, and he shows how nature depends on probability rather than certainty. He keeps the mathematics minimal and avoids the usual metaphors.

It suits curious readers who want to understand one of the most accurate physics theories without a degree. Expect careful, patient reasoning from a physicist who loved making a hard subject feel plain. The book also gives a clear sense of how physicists reason, including their willingness to accept results that seem odd, provided experiments confirm them.

Deep and outward-looking; a moderate read.

Best for readers like The Systems Thinker. Which reader are you?