Around at my senior-high-school age, I was good at physics, but not interested in it.
After entering some university and being thirsty for letters and characters, I was deeply touched by relativity theory as reading it through one of "Bluebacks" series as an amusing book. "How beautiful physics it is!" I felt, so almost changed my field of specialization to physics.

Accordingly, I would like to introduce the Relativity Theory to you with reference to some books. Because I have not specially learned it, it would be appreciated if you understand it as a little knowledge.

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