Q. I've been using a book through Google Books, but I am travelling overseas now and I can't access it. What's wrong? How can I read the book?

There are many Google books that are accessible only in the U.S., usually books that have been deemed out of copyright in the US but not necessarily in other countries. As a result, Google tends to interpret copyright conservatively and restricts access outside the US. The limitation has been put in place by Google and not by Harvard.