Linear Algebra: Essence and Form

For the benefit of those without Twitter accounts like myself, the preprint of the textbook seems to be at <a href="https:&#x2F;&#x2F;www2.math.upenn.edu&#x2F;~ghrist&#x2F;preprints&#x2F;LAEF.pdf" rel="nofollow">https:&#x2F;&#x2F;www2.math.upenn.edu&#x2F;~ghrist&#x2F;preprints&#x2F;LAEF.pdf</a>