Understand Special and General Relativity

I translated a book by Einstein, the meaning of relativity, with some colleagues many years ago. This book is a comprehensive introduction of Einstein's Relativity theory. Different from most text book on Relativity, this book starts from some very basic reasoning rather than from a top-down logic. It shows how Einstein think about the theory and why he can come up with such thoughts. I should say, if you just want to be a good student, then text books should be your best resources. However, if you want to be a great scientist, then this type of book is for you. It tells you why the theory comes into being....