30-Second Economics
Keynesian Economics, Free Market Capitalism, Monetarism, Game Theory, and The Invisible Hand? Sure, you know what they all mean. That is, you've certainly heard of them. But ...
30- Second Politics (The 50 most thought-provoking theories in politics, each explained in half a minute)
30-Second Philosophies The 50 Most Thought-Provoking Philosophies, Each Explained in Half a Minute
30-Second Theories: The 50 Most Thought-Provoking Theories in Science, Each Explained in Half a Minute
30-second Religion (The 50 most thought-provoking religious beliefs, each explained in half a minute)
30-Second Psychology
30 Second Math
30-Second Anatomy (The 50 most important structures and system in the body, each explained in half a minute.) First Printing edition by Gabrielle M. Finn (2012) Hardcover
30-Second Brain