The product is a 2009 Pearson textbook titled "Linear Algebra" by Steven J. Leon. It is a hardcover textbook written in English, and has functioned as a great guide/refresher up for up to a PhD level education in the subjects of chemistry, quantum mechanics, physics, mathematics, and applied mathematics, where the understanding of linear algebra is paramount. The book is suitable for beginners, advanced, and intermediate learners and is published by Pearson in the United States.