Linear Algebra for Programmers

I am excited to share something I have been working for over a year in my spare time - an e-book of visual essays titled "Linear Algebra for Programmers" - https://www.linearalgebraforprog... (the website is not optimized for mobile devices yet). I approach the topic by talking about taking a weighted sum of numbers (and then vectors). Everything else builds up by just observing and interacting with weighted sums. I don't talk about determinants at all (which wasn't easy, esp when dealing with singular matrices). I really like (educational) content written in the format of visual essays like `distill.pub` or `The Pudding`. I tried doing something similar a few years ago while covering some math topics (https://tinyvolt.com/) and then decided to create something more cohesive rather than writing on random topics. This is my first attempt at such a thing and I am sure there are a ton of things that need to be improved or fixed. I hope you enjoy it and find it useful. Feedback and brickbats are welcome!