Don't try to locate it in “Open Access” at the top. Look the page in a desktop browser. Directly below the book's cover, there's a “Resources”. To the right of

Don't try to locate it in “Open Access” at the top. Look the page in a desktop browser. Directly below the book's cover, there's a “Resources”. To the right of that “Resources”, there are “Overview”, “Author(s)”, “Open Access”; and that “Open Access” is the one you want.