Read it your way
The full text is free to read here, and will be free to download. That is the honest move for a book about prices: a digital copy costs almost nothing to make, so the file is not where the value lives. What a copy can't carry, the named person who staked something on the words, is the part that was ever worth paying for. The print edition and your support are for that part, if you want them.
EPUB works in Apple Books, Kindle (send-to-Kindle), Google Play Books, Kobo, and most readers. No account, no email.