Special Relativity

On the Electrodynamics of Moving Bodies

Albert Einstein

Special relativity derived from two postulates, dissolving absolute time without introducing a single new force.

Assumes Maxwell's equations and ordinary algebra — famously no tensors, which is why it is still readable

Lecture Collection: Special Relativity

Leonard Susskind (Stanford)

Derives special relativity and classical field theory from the invariance of the interval, keeping the mathematics at the level a physicist actually uses rather than a populariser's analogies.