Supporters do get access to PDFs of his draft books. These are rewrites of his original book on tensor calculus [1]. I worked through most of the original and

Supporters do get access to PDFs of his draft books. These are rewrites of his original book on tensor calculus [1]. I worked through most of the original and I thought it was quite good. [1] https://www.amazon.com.au/Introduction-Tensor-Analysis-Calculus-Surfaces/dp/1461478669 https://www.amazon.com.au/Introduction-Tensor-Analysis-Calcu...