Jonathan Allday took his first degree in physics at Cambridge, then moved to Liverpool University where he gained a PhD in particle physics in 1989. While carrying out his research, he joined with a group of academics and teachers working on an optional syllabus to be incorporated into A-level Physics. This new option was designed to bring students up to date on advances in particle physics and cosmology. An examining board accepted the syllabus in 1993 and now similar components appear on many advanced courses and some aimed at GCSE level. Shortly after this, Jonathan started work on Quarks, Leptons and the Big Bang, published by CRC Press and now in its 3rd edition, which was intended as a rigorous but accessible introduction to these topics. Since then, he has also written Apollo in Perspective, Second edition; Quantum Reality; and Space-time: An Introduction to Einstein's Theory of Gravity also published by CRC, as well as co-authoring various textbooks for 16+ levels. He is also active writing articles for Physics Review which is a journal intended for 16+ physicists. After more than 30 years in teaching and school management, Jonathan has now retired and lives with his family in Worcestershire.

Introduction. Chapter 1. Our First Encounter with the Quantum World: Light. Chapter 2. Particles. Chapter 3. Quantum States. Chapter 4. Amplitudes. Chapter 5. Measurement. Chapter 6. Interference. Chapter 7. Free Particles. Chapter 8. Identical Particles. Chapter 9. Scattering Identical Bosons. Chapter 10. Spin. Chapter 11. Fermion States. Chapter 12. Continuous Bases. Chapter 13. Uncertainty. Chapter 14. The Equations of Quantum Theory. Chapter 15. Constrained Particles. Chapter 16. Genealogy. Chapter 17. Planck and Einstein. Chapter 18. Bohr. Chapter 19. Heisenberg. Chapter 20. De Broglie & Schrödinger. Chapter 21. Dirac. Chapter 22. Conclusions. Chapter 23. Quantum Correlations. Chapter 24. Quantum Computing. Chapter 25. Density Operators. Chapter 26. Interpretations. Chapter 27. The Copenhagen Interpretation. Chapter 28. The Many Worlds Interpretation. Chapter 29. Assorted Alternatives. Chapter 30. Consistent Histories. Chapter 31. The Ontological Interpretation. Chapter 32. Quantum Field Theory. Chapter 33. Personal Conclusions. Appendix.