Einstein's World - Explained Simply. Can the theory of special relativity be understood as easily as the functioning of a bicycle or a car? The theory of relativity was brought to life by Einstein's genius, overcoming a mountain of problems. However, the reader of this Teubner starter guide does not need to take the steep path. Instead, the book allows for a genuine understanding of the theory of relativity without immediately invoking the complete toolkit of theoretical physics. Einstein's principle of the universal constancy of the speed of light is approached in this introduction in small steps: less abstract than in conventional presentations, yet still precise.