Quantum Theory -

What is your current knowledge (e.g., beginner, high school, college student)?

by Richard Feynman. A classic layman-level explanation of quantum electrodynamics that remains accurate without relying on complex equations. Formal Textbooks (Mathematical) Quantum Theory

. Follows the rise of the quantum revolution and the key breakthroughs from Planck to Heisenberg. To help me suggest the best specific resource, let me know: What is your current knowledge (e

~$15.99 at Barnes & Noble (Paperback) or ~$7.49 (eBook). Formal Textbooks (Mathematical)

by Peter Bongaarts. A more rigorous text for advanced students interested in the underlying mathematical structures of the theory. Price: ~$54.99 at Books A Million . Visual & Multimedia Learning

by Leonard Susskind. Designed for "amateur" physicists who want to understand the actual foundations of the theory beyond just popular science descriptions.

For those with a background in calculus and physics who want to "do the math."