Many courses are now available at sale prices. Each course goes on sale at least once a year—we produce a large quantity and pass the savings on to our customers.

• Albert Einstein: Physicist, Philosopher, Humanitarian
• Big History: The Big Bang, Life on Earth, and the Rise of Humanity
• Biological Anthropology: An Evolutionary Perspective
• Biological Anthropology: An Evolutionary Perspective & Biology and Human Behavior: The Neurological Origins of Individuality (Set)
• Black Holes Explained
• Black Holes Explained & Understanding the Universe: An Introduction to Astronomy, 2nd Edition (Set)
• Change and Motion: Calculus Made Clear, 2nd Edition
• Cosmology: The History and Nature of Our Universe
• Dark Matter, Dark Energy: The Dark Side of the Universe
• Darwinian Revolution & Understanding Genetics: DNA, Genes, and Their Real-World Applications (Set)
• Discrete Mathematics
• Games People Play: Game Theory in Life, Business, and Beyond
• Great Ideas of Classical Physics
• Great Scientific Ideas That Changed the World
• High School Level—Algebra II
• High School Level—Algebra I
• High School Level—Algebra I & Algebra II (Set)
• High School Level—Basic Math
• High School Level—Chemistry, 2nd Edition
• High School Level—Geometry
• High School Level—How to Become a SuperStar Student
• Human Prehistory and the First Civilizations
• Introduction to Number Theory
• Joy of Mathematics
• Joy of Mathematics & Change and Motion: Calculus Made Clear (Set)
• Joy of Thinking: The Beauty and Power of Classical Mathematical Ideas
• Mathematics, Philosophy, and the "Real World"
• Meaning from Data: Statistics Made Clear
• Meaning from Data: Statistics Made Clear & What Are the Chances? Probability Made Clear (Set)
• Nature of Earth: An Introduction to Geology
• Nutrition Made Clear
• Nutrition Made Clear & The Human Body: How We Fail, How We Heal (Set)
• Origins of Life
• Particle Physics for Non-Physicists: A Tour of the Microcosmos
• Physics in Your Life
• Physics in Your Life & Einstein's Relativity and the Quantum Revolution (Set)
• Quantum Mechanics: The Physics of the Microscopic World
• Science and Religion
• Science Wars: What Scientists Know and How They Know It
• Superstring Theory & Dark Matter, Dark Energy (Set)
• Superstring Theory: The DNA of Reality
• Theory of Evolution: A History of Controversy
• Understanding Complexity
• Understanding Genetics: DNA, Genes, and Their Real-World Applications
• Understanding the Brain
• Understanding the Human Body & Understanding the Brain (Set)
• Understanding the Universe: An Introduction to Astronomy, 2nd Edition