Ernst Mach — physicist, psychologist, and the philosopher whose criticisms of absolute space prepared the ground for Einstein — collected in Popular Scientific Lectures his famous public addresses: on the velocity of light, the sensations of tone, symmetry, and his signature doctrine that science is thought’s economy, description made maximally efficient.
Einstein credited Mach’s scepticism as a direct inspiration. Download the free EPUB and hear the lectures that taught physics to doubt itself productively.