The novel centers around three friends in different places in life: Brad is a Baptist investment banker, Lauren is an unbelieving former Catholic corporate attorney, and Jarrod is a Charismatic graduate student in philosophy. Each Sunday they gather as any friends might to talk and enjoy each other's company.

During one of their meetings Brad meets a new friend, Dr. MaGregor, who will soon turn their meetings upside down, or rightside up, depending on your perspective. Dr. MacGregor eventually presents them with the basics of Christian theology, all while addressing such things as sin, evil, sovereignty, and a number of other weighty issues.

The book is notable for its ease of reading and broad appeal, to the believer and nonbeliever. Common Grounds is good for what it sets out to be. It isn't a Tom Wolfe or P.K. Dick novel, and it makes no attempt to suggest otherwise. Don't expect to find it on Time's list of 100 best English-language novels. But it's an enjoyably engaging book for high school grads and college students that are grapling with theological and apologetic issues.