The A B C of Relativity

Space changed. Time changed. The universe was never the same.

Bertrand Russell’s The A B C of Relativity is one of the most accessible introductions ever written to one of the greatest scientific revolutions of the modern age. With remarkable clarity and wit, Russell explains the fundamental ideas behind Einstein’s theories of relativity, guiding readers through concepts such as space, time, motion, gravity, and the relationship between matter and energy. Rather than simply presenting scientific formulas, Russell explores how relativity transformed humanity’s understanding of reality itself and challenged long-held assumptions about the nature of the universe. Written for the curious reader rather than the specialist, this elegant work remains a model of scientific explanation and philosophical reflection.

• First published in 1925
• One of the most celebrated popular introductions to Einstein’s theories of relativity
• A fascinating exploration of space, time, motion, gravity, physics, and the changing nature of scientific knowledge

Available in multiple formats:

Paperback — Elegant print edition presenting the complete, unabridged text, and ships in 3–5 business days.
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Audiobook — Professionally narrated, complete, and unabridged. Available on Audible, Spotify, Apple Books.

A timeless introduction to one of science’s most profound discoveries, The A B C of Relativity reveals Bertrand Russell’s rare ability to make the mysteries of the universe understandable while showing how scientific breakthroughs reshape the way we see reality itself.

About the Author

Bertrand Russell (1872–1970) was a British philosopher, logician, mathematician, essayist, and social critic widely regarded as one of the most influential thinkers of the twentieth century. Awarded the Nobel Prize in Literature in 1950, Russell made groundbreaking contributions to logic, analytic philosophy, the philosophy of mathematics, and the study of language. His major works include Principia Mathematica (with Alfred North Whitehead), The Problems of Philosophy, A History of Western Philosophy, The Analysis of Mind, and Why I Am Not a Christian. Known for his intellectual independence, clarity of thought, and lifelong commitment to reason, peace, and human progress, Russell remains one of the defining philosophical voices of the modern era.