This ( the Audible version) is not a book that you can listen to while doing the dishes or folding laundry. It requires total concentration, and frequent backtracks ( I even changed mine from 15 seconds to 60... you‘ll understand why if you listen to it) to get total understanding of the concepts. For that reason, I am taking much longer to get through this wonderful story. Best part: hearing her recorded voice giving talks...Gives it LIFE!