Fang Lizhi Fang & Chu Y Q Chu 
From Newton’s Laws To Einstein’s Theory Of Relativity [PDF ebook] 

This book aims to introduce to the reader the main thread of development from Newton’s laws to Einstein’s theory of relativity. Limited by its scope and avoiding as much as possible the use of mathematical apparatus, the authors try to clarify the most fundamental ideas and concepts. Both authors hold a deep reverence for Galileo and Einstein, and this book is dedicated to these two great scientists.