Douglas Ross, an emeritus professor at Southampton, builds his public 2018 introduction from high-school physics and mathematics, moving from classical waves and particles into quantum theory. It covers the photoelectric effect, duality, uncertainty, wavefunctions and tunneling, then collapse, interpretations and hidden variables. Its central distinction is between accurately calculating experimental outcomes and picturing the inside of an atom through everyday experience. The text provides step-by-step explanations and a glossary, while the mathematical appendix assumes introductory university mathematics. This is a learning resource, not a new discovery.