Matteo Valleriani & Andrea Ottone The Early Modern Academic Book Market Seen Through The ≪ Sphere ≫ of Sacrobosco.- Section 1: Production Dynamics.- Richard Oosterhoff The ≪ Sphere≫ and the Estienne Print Shop in Paris .- Catherine Kikuchi Erhard Ratdolt's Edition of the ≪Sphaera≫ A New Editorial Model in Venice?.- Insa-Christiane Hennen Printers, Publishers and Book Binders in Wittenberg in the Sixteenth Century: Real Estate, Vicinity, Political and Cultural Activities.- Saskia Limbach Publishing the Sphaera in Sixteenth-Century Wittenberg.- Section 2: Distribution Dynamics.- Ian Maclean Sacrobosco at the Book Fairs, 1564-1624: The Pedagogical Marketplace.- Alejandra Ulla Lorenzo Exploring the Circulation of Sacrobosco's ≪Tractatus de sphaera≫ in Early Modern Iberian Peninsula and New World Printing.- Andrea Ottone The Giunti's Publishing and Distributing Network and Their Supply to the European Academic Market.- Isabelle Pantin Mathematical Books in Paris (1531-1563): The Development of Editorial Policies in a Competitive International Market.- Matteo Valleriani & Christoph Sander Exploring Social Relations Between Early Modern Publishers and Printers by Means of Paratexts.- Section 3: Usage Dynamics.- Paul F. Grendler The Sphaera in Jesuit Astronomical and Mathematical Education.- Richard Kremer Printing Sacrobosco in Leipzig, 1488-1520: Local Markets and " Academic" Publishing.- Alissar Levy Publishing Mathematical Books to Calculatores in Paris (1508-1515).- Stefano Gulizia Traces of ≪The Sphere≫ in Early Modern Poland and in the German/Baltic Cultural Region.