The fourth edition of Linear Algebra Done Right by Sheldon Axler is now available as a free Open Access textbook in multiple languages including English, Chinese, Farsi, Greek, and Portuguese. The Creative Commons BY-NC licensed edition features over 250 new exercises and 70 new examples, with several additional topics and improvements throughout.

This best-selling undergraduate text adopts a novel approach that banishes determinants to the end, focusing instead on understanding linear operators on finite-dimensional vector spaces. The book starts with vector spaces, linear independence, span, basis, and dimension, then progresses through linear maps, eigenvalues, eigenvectors, inner product spaces, and the finite-dimensional spectral theorem.

Electronic versions are legally available at no cost, with print editions accessible via Amazon. The text has been adopted by over 430 universities and colleges and is praised for its clarity, elegant proofs, and didactic excellence. Axler's determinant-free methodology has been called a "tour de force" in mathematical exposition.