Great book here, by a presbyterian pastor in Lynchburg, Virginia. It covers each of the seven deadly sins from a practical and Reformed perspective. Pride, envy, anger, sloth, greed, gluttony, and lust. It is easy reading, but also convicting and piercing. The introduction is especially good on how to grow in the Christian life by grace. There are Scriptures and prayers at the end of each chapter, to lead you to the Lord regarding each of these sins.
Pick it up here.