"This is a book for beginners in linear algebra. Duc Tran aims for simple statements of the ideas and facts that he needs. He organizes them in a coherent way: first the main facts about vectors and then about matrices. For a matrix, he discusses elimination to echelon form and then the rank and the four fundamental subspaces. The result is a short book that a student can read." - Professor Gilbert Strang, Massachusetts Institute of Technology (MIT)