"This book is available to patrons with print disabilities"

Hey so I was reading a book on IA earlier this month. A few days ago I come back to the book to reread it, and suddenly I can't read it anymore and only people with print disabilities can.

What the hell is going on? I understand if they have a special library that only disabled patrons can use, but I was reading this exact book a month ago (I mean my computer remembered the URL and everything when I came back to it) and suddenly I can't read it anymore?