One of the more intriguing relationships of the Protestant Reformation was the friendship which developed between Philip Melanchthon and John Calvin. Melanchthon was a protege of Luther's and played a central role in systematizing Lutheran theology. Likewise, Calvin's Institutes quickly became one of the clearest and most popular expressions of Protestant theology. Calvin expressed his admiration of Melanchthon in the dedication to one of his commentaries, and Melanchthon paid Calvin the honor of nicknaming him "The Theologian."

This year marks the quincentennial, or 500th anniversary, of Calvin's birth, and we're honoring the occasion by offering a sale on his works and the works of his fellow "theologians." Many of those works are included in the Standard and Premier levels of the Library, but if you don't already have them, you can unlock them at a reduced price. You can also save on add-ons like Grudem's Systematic Theology, Piper's Sermon Manuscript Library, and commentaries by MacArthur and Stott.

You'll find all the details of the sale here.