A laboratory curiosity at first, lithium is now a part of our society. Unknown to most people, it is being used in many practical applications, such as ceramics, greases, electronics, medicine, and hopefully in the future, will be used in a fusion that would solve world’s energy problems. While lithium has been the subject of many specific publications, no comprehensive book covering all aspects of lithium has been published so far. This book discusses the original discovery of lithium, its development from a mineral of curiosity to an expanding industry, its geological occurrences, and its various applications, culminating in its present use in the ever-expanding electromotive industry. The author’s wonderful and exciting experiences of his long lithium career shared in the book will satisfy the readers’ curiosity about this expanding industry.