Pick up (theoretical) or "Introduction to Linear Algebra" by Lee W. Johnson, R. Dean Riess, and Jimmy T. Arnold (applied). Johnson’s book is very similar in spirit to Hadley and much easier to find as a modern ebook.

G. Hadley’s Linear Algebra (formally titled Linear Algebra ) is something of a cult classic. Published in the early 1960s, it sits in a sweet spot between theoretical rigor and applied practicality, particularly for students in economics, operations research, and engineering.

Is Hadley’s Linear Algebra worth the PDF hunt? Specifically, if you are an economist or operations researcher, his treatment of systems of inequalities (Chapter 5) is worth the price of admission alone.

So, where does that leave the modern learner looking for a PDF? Let’s talk about the book, its value, and the reality of finding it digitally.