Table of Contents: “...Part I Gravity and Prague -- Kepler and Mach's Principle -- Einstein in Prague: Relativity Then and Now -- Part II Classical General Relativity -- Observers, observables and measurements in general relativity -- Some links between general relativity...”

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Table of Contents: “... Super energy Tensors in General Relativity: a Reappraisal -- Einstein's "Prague Field Equation" of 1912 - Another Perspective -- Source Integrals of Asymptotic Multipole Moments -- Geodesic Equations and Algebro-Geometric Methods -- Illusory Horizons...”

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