For the second edition, published in 1539, Calvin changed its format in favor of systematically presenting the main doctrines from the Bible. In the process, the book was enlarged from six chapters to seventeen. He concurrently worked on another book, the Commentary on Romans, which was published in March 1540. The book was a model for his later commentaries: it included his own Latin translation from the Greek rather than the Latin Vulgate, an exegesis, and an exposition. In the dedicatory letter, Calvin praised the work of his predecessors Philipp Melanchthon, Heinrich Bullinger, and Martin Bucer, but he also took care to distinguish his own work from theirs and to criticize some of their shortcomings.
For the second edition published in 1539 Calvin changed its format in favor of systematically presenting the main doctrines from the Bible In the process the book was enlarged from six chapters to seventeen He concurrently worked on another book the Commentary on Romans which was published in March 1540 The book was a model for his later commentaries it included his own Latin translation from the Greek rather than the Latin Vulgate an exegesis and an exposition In the dedicatory letter Calvin praised the work of his predecessors Philipp Melanchthon Heinrich Bullinger and Martin Bucer but he also took care to distinguish his own work from theirs and to criticize some of their shortcomings