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It demystifies the subject. It takes the scary monster of O-Chem and shows you that it’s just a guy in a rubber mask. Once you see the mask, you stop being afraid.
If you read a standard textbook chapter on Stereochemistry, you might read 15 pages of history and theory before you get to the point about R and S configurations. Ridiculously Simple cuts the fluff. It tells you what you need to know to pass the exam. It respects your time. It is the "Cliff's Notes" version of the science, written by someone who understands the curriculum.