約翰•麥剋斯維爾博士，全球傑齣的領導力問題解決專傢、超級暢銷書《領導力21法則》作者、Guru of World Leadership（世界領導力導師）排名榜首，他創立瞭全球影響力首屈一指的領導力培訓機構INJOY & The John Maxwell Company。

在過去20年間，全球超過126個國傢的政要和數韆萬企業傢參加過麥剋斯維爾博士的培訓，涵蓋西點軍校、哈佛大學、斯坦福大學、微軟、蘋果、三星、可口可樂、波音、通用電氣、惠普、福特、AT&T、陶氏化學和康寜玻璃等世界500強企業，以及如NCAA(美國大學生體育協會)、NBA、NFL(美國橄欖球聯盟)等體育機構，就連奧巴馬、比爾•蓋茨、巴菲特和喬布斯都曾專門嚮他請教領導力問題。

In the" Developing the Leader Within You Workbook," John Maxwell examines the differences between leadership styles, outlines specific ways each reader can apply principles for inspiring, motivating, and influencing others. These principles can be used in any organization to foster integrity and self-discipline and bring a positive change. "Developing the Leader Within You Workbook" also allows readers to discover how to be effective in the highest calling of leadership by understanding the five characteristics that set "leader managers" apart from "run-of-the-mill managers." In this companion to the bestseller, John Maxwell shows readers how to develop the vision, value, influence, and motivation required of successful leaders.