Since 1973, Galois theory has been educating undergraduate students on Galois groups and classical Galois theory. InGalois Theory, Fifth Edition, mathematician and popular science author Ian Stewart updates this well-established textbook for today’s algebra students.New to the Fifth EditionReorganised and revised Chapters 7 and 13New exercises and examplesExpanded, updated referencesFurther historical material on figures besides Galois: Omar Khayyam, Vandermonde, Ruffini, and AbelA new final chapter discussing other directions in which Galois theory has developed: the inverse Galois problem, differential Galois theory, and a (very) brief introduction top-adic Galois representationsThis bestseller continues to deliver a rigorous, yet engaging, treatment of the subject while keeping pace with current educational requirements. More than 200 exercises and a wealth of historical notes augment the proofs, formulas, and theorems.