Best introductory text on this subject. Exposition is very clear, accompanied by lots of examples. The book doesn't jump straight into matrices like that of Strang, but, instead, starts with abstract vector spaces. This allows for a more categorical approach. Indeed, product, quotient, and dual spaces are introduced early on. Along the same line, linear maps are introduce before subjecting them to specific ordered bases to obtain matrices. There are dedicated sections that deals with fundamental issues, e.g., the existence of bases in the infinite dimensional case via the axiom of choice. Courageous are the authors to include abstract examples such as the inner product of two integrable functions over the reals by means of the integral of their product. These examples proves useful for further studies. However, the publisher excluded the essential chapter on Jordan forms from the international edition. This sort of malpractice is infuriating!