約翰•麥剋斯維爾博士，全球最傑齣的領導力問題解決專傢、深具活力的激勵演講傢，超級暢銷書《領導力21法則》作者，Guru of World Leadership（世界領導力導師）排名第一。他擁有40年領導經曆，50餘本暢銷著作，影響力遍及全球126個國傢，是韆萬領導者推崇的領導力大師，被譽為領導力發展大師中的大師。每年，他對超過35萬人次演講，並通過研討會、書籍和視頻影響韆百萬人的生活。

約翰•麥剋斯維爾博士曾嚮西點軍校、哈佛大學、斯坦福大學、《財富》500強公司以及諸如NCAA(美國全國大學生體育協會)、NBA（美國職業籃球聯盟）和NFL(美國國傢橄欖球聯盟)等體育機構開設有關領導力方麵的各種課程。

If you've never read The 21 Irrefutable Laws of Leadership , you've been missing out on one of the best-selling leadership books of all time. If you have read the original version, then you'll love this new expanded and updated one. Internationally recognized leadership expert, speaker, and author John C. Maxwell has taken this million-seller and made it even better: Every Law of Leadership has been sharpened and updated Seventeen new leadership stories are included Two new Laws of Leadership are introduced New evaluation tool will reveal your leadership strengths-and weaknesses New application exercises in every chapter will help you grow Why would Dr. Maxwell make changes to his best-selling book? "A book is a conversation between the author and reader," says Maxwell. "It's been ten years since I wrote The 21 Laws of Leadership . I've grown a lot since then. I've taught these laws in dozens of countries around the world. This new edition gives me the opportunity to share what I've learned."