to Volumes 1 and 2: The Zurich Notebook and the Genesis of General Relativity -- Classical Physics In Disarray -- The First Two Acts -- Pathways out of Classical Physics -- Einstein's Zurich Notebook -- A Commentary on the Notes on Gravity in the Zurich Notebook -- What was Einstein's "Fateful Prejudice"? -- What did Einstein know and when did He know it? A Besso Memo Dated August 1913 -- Untying the Knot: how Einstein Found his way Back to Field Equations Discarded in the Zurich Notebook -- The Gravitational Force between Mechanics and Electrodynamics -- Gravitation in the Twilight of Classical Physics: An Introduction -- The Third Way to General Relativity: Einstein and Mach in Context -- Gravitation -- Considerations on Gravitation -- Absolute or Relative Motion? -- On Absolute and Relative Motion -- An Astronomical Road to a New Theory of Gravitation -- The Continuity Between Classical and Relativistic Cosmology in the Work of Karl Schwarzschild -- Things at Rest in the Universe -- A New Law of Gravitation Enforced by Special Relativity -- Breaking in the 4-Vectors: The Four-Dimensional Movement in Gravitation, 1905-1910 -- On The Dynamics of the Electron (Excerpts) -- Mechanics and the Relativity Postulate -- Old and New Questions in Physics (Excerpt) -- The Problem of Gravitation as a Challenge for the Minkowski Formalism -- The Summit Almost Scaled: Max Abraham as a Pioneer of a Relativistic Theory of Gravitation -- On the Theory of Gravitation -- The Free Fall -- A New Theory of Gravitation -- Recent Theories of Gravitation -- A Field Theory of Gravitation in the Framework of Special Relativity -- Einstein, Nordström, and the Early Demise of Scalar, Lorentz Covariant Theories of Gravitation -- The Principle of Relativity and Gravitation -- Inertial and Gravitational Mass In Relativistic Mechanics -- On the Theory of Gravitation from the Standpoint of the Principle of Relativity -- On the Present State of the Problem of Gravitation -- From Heretical Mechanics to a New Theory of Relativity -- Einstein and Mach's Principle -- On the Relativity Problem -- Ether and the Theory of Relativity -- From an Electromagnetic Theory of Matter to a New Theory of Gravitation -- Mie's Theories of Matter and Gravitation -- Foundations of a Theory of Matter (Excerpts) -- Remarks Concerning Einstein's Theory of Gravitation -- The Principle of the Relativity of the Gravitational Potential -- The Momentum-Energy Law in the Electrodynamics of Gustav Mie -- Including Gravitation in a Unified Theory of Physics -- The Origin of Hilbert's Axiomatic Method1 -- Hilbert's Foundation of Physics: From a Theory of Everything to a Constituent of General Relativity -- Einstein Equations and Hilbert Action: What is Missing on Page 8 of the Proofs for Hilbert's First Communication on the Foundations of Physics?1 -- The Foundations of Physics. -- The Foundations of Physics (First Communication) -- The Foundations of Physics (Second Communication) -- From Peripheral Mathematics to a New Theory of Gravitation -- The Story of Newstein or: Is Gravity Just Another Pretty Force? -- On the Relation of Non-Euclidean Geometry to Extension Theory -- Notion of Parallelism on a General Manifold and Consequent Geometrical Specification of the Riemannian Curvature (Excerpts) -- Purely Infinitesimal Geometry (Excerpt) -- The Dynamics of Continuous Media and the Notion of an Affine Connection on Space-Time.