Assurance of salvation is the subject of this highly readable, practical book, the only book the author ever wrote. With vast pastoral concern for believers struggling with uncertainty of heart about their assurance, and unbelievers living comfortably with a false assurance, Guthrie shows what a true interest in Christ is, and answers important and common questions that arise. John Owen, based on this one book, regarded Guthrie as one of the greatest ministers to have ever written.

All of Guthrie’s teaching and pastoral experience were poured into The Christian’s Great Interest – his only book. The remarkable fact that is has gone through more than eighty editions and been translated into several languages testifies to its value. This book describes in a clear and attractive style what it means to be a Christian, and how to become one.

This book is all about Christ: the Christian’s great interest should be Christ; the unbeliever needs to develop an interest in Christ. It describes in a simple, clear, and attractive style what it means to be a Christian, and how to become one.