Contents: Introduction; (1) The Libraries of Tycho Brahe & of Paul Wittich: The Misleading Attribution of the Copernican Annotations; Master Paul Wittich; Tycho's Attempts to Acquire Wittich's Library; & The Prague Tychoniana; (2) Wittich's Copernican Annotations: Reinhold's Annotations & the Liege "De revolutionibus"; The Vatican Wittich Copy; The Prague & Wroclaw Wittich Copies; & Why Annotate Four Copes of "De revolutionibus"?; (3) Reconstructing...