High-level study discusses Newtonian principles and 19th-century views on electrodynamics and the aether and covers Einstein's electrodynamics of moving bodies, Minkowski geometry, and other topics, including a rich exposition of the elements of the special and general theories of relativity.
Here's a sample of other books in this Dover category
The Principle of Relativity by Albert Einstein, Francis A. Davis Eleven papers that forged the general and special theories of relativity include seven papers by Einstein, two by Lorentz, and one each by Minkowski and Weyl. 1923 edition.
Einstein’s Theory of Relativity by Max Born Semi-technical account includes a review of classical physics (origin of space and time measurements, Ptolemaic and Copernican astronomy, laws of motion, inertia, more) and of Einstein's theories of relativity.
Theory of Relativity by W. Pauli Nobel Laureate's brilliant early treatise on Einstein's theory consists of his original 1921 text plus retrospective comments 35 years later. Concise and comprehensive, it pays special attention to unified field theories.
Space and Time by Emile Borel This classic covers geometry and the shape of the earth, space and time in astronomy, abstract geometry and geographical maps, continuity and topology, the propagation of light, more. 1926 edition. 15 figures.