OP is going to have to disambiguate what it means to "click the Open Access tab and you're good to go". It's easy to assume that means there be a PDF waiting th

OP is going to have to disambiguate what it means to "click the Open Access tab and you're good to go". It's easy to assume that means there be a PDF waiting there, or at least a link to get to it. I see nothing of the sort in Firefox or in Chrome browsers. There's an open access symbol but that's not an active link. My test case is this: https://mitpress.mit.edu/books/category-theory-sciences https://mitpress.mit.edu/books/category-theory-sciences linked from the top link