Jörg Resag has a PhD in theoretical physics. As a successful popular science author, he is known for his easily understandable and instructive explanations of scientific ideas, both in his books and on the Internet.

Adolescent years and the principle of least action.- Princeton, Path Integrals, and the Manhattan Project.- Feynman's Path to Quantum Electrodynamics.- California, super cold helium, and the weak interaction.- From researcher to teacher and Nobel Prize winner.- Quarks, computers, and the Challenger disaster.- Glossary.- Sources and Literature.