ABSTRACT
Luther was an extremely prolific author. His works, in num-
ber more than four hundred, fill more than a hundred volumes. He was also an extremely popular author. On February 14, 1519, Froben, the great Basel publisher, wrote him that his works were already exported to France, Spain, Italy, the Low Countries, and England, as well as to all parts of the Empire. The number of the editions was legion. The letters of the time are full of references to the latest publications of the Reformer. On November 1, 1520, for example, Glarean writes Zwingli from Paris that no books are bought more quickly than Luther's, and that at the last Frankfort fair (the great book mart of Germany held in the spring of every year) fourteen hundred copies of his works had been sold. This was before Luther had written any of his greatest works.
