葛尼斯（Os Guinness），毕业于牛津大学，修得社会学博士学位，曾与薛华（Francis A.Schaeffer）同工。1984年迁居美国，现职是“三一论坛”的资深院士。葛尼斯所带领的“三一论坛”，常邀请社会各界精英，借着阅读、讨论、质疑及提出方法，来面对当代社会各种公共议题。他学识丰富，涉猎广泛，不避讳面对现代文化及信仰问题，勇于提出务实的见地。除了公共议题及社会人文外，他同样以基督徒的身份思考人生的意义与正确的方向。

葛尼斯著作丰富，除本书外，还有《交换明天》、《怀疑——通往成熟信仰的途径》等。

The Call continues to stand as a classic, reflective work on life's purpose. Best-selling author Os Guinness goes beyond our surface understanding of God's call and addresses the fact that God has a specific calling for our individual lives.</p>

Why am I here? What is God's call in my life? How do I fit God's call with my own individuality? How should God's calling affect my career, my plans for the future, my concepts of success? Guinness now helps the reader discover answers to these questions, and more, through a corresponding workbook - perfect for individual or group study.</p>

According to Guinness, "No idea short of God's call can ground and fulfill the truest human desire for purpose and fulfillment." With tens of thousands of readers to date, The Call is for all who desire a purposeful, intentional life of faith.</p>

Also availbale in audio format, narrated by Os Guinness.</p>