An Alarm to the Unconverted Author:Joseph Alleine An Alarm to the Unconverted, also known as The Sure Guide to Heaven, is the most famous devotional written Joseph Alleine, a leading Puritan pastor. The book is still in print today and is considered a great read for Christians of all denominations. Joseph Alleine was an English nonconformist pastor in the 17th century who is also known for bein... more »g a prolific theological writer.« less