Samuel Eliot Morison, Christopher Columbus, Mariner, Boston, Little, Brown and Company, 1955.
Johannes Müller alias Regiomontanus (6 June 1436 - 6 July 1476), famous mathematician and astronomer
The editio princeps of Astronomicon was prepared by the astronomer Regiomontanus, using very corrupted manuscripts, and published in Nuremberg about 1473.