For those who want to learn geometric algebra I strongly recommend Linear And Geometric Algebra by Macdonald. I taught myself this subject entirely from this bo

For those who want to learn geometric algebra I strongly recommend Linear And Geometric Algebra by Macdonald. I taught myself this subject entirely from this book (making sure I did all the exercises) and even enjoyed the process! Slightly weirdly an application of the algebra became useful at work shortly after finishing the book.