Of all the Puritan works 'The Doctrine of Repentance' by Thomas Watson is one of the most popular. It is a call and challenge to all believers to examine their lives and truly see if they are repenting and believing in Christ, if they are turning from sin and turning to their heavenly Father.
If you do not want to be challenged in your Christian life and shown what sin will cost you then this book is not for you. If you want your best life now this book is not for you. But if you want someone to show what the genuine versus the pretender Christian looks like then this if the book for you.
This edition has been lightly updated to update some spellings and with relevant footnotes to aid in the understanding of the text.