Melanchthon‹s books on Aristoteles ›Nichomachean Ethics‹ are some of his most successful works. They were revised several times during his lifetime and there were several new editions after his death. The Latin-German edition of these two books is based on the original Wittenberg edition from 1550 and does not incorporate numerous unsubstantianted variants which can be found in the first edition, the ›Corpus Reformatorum‹, published in 1850, which has been out of print for decades.