400. That’s an error.

Google cannot redirect you to http://www.thriftbooks.com/w/fodors-toronto-with-niagara-falls--the-niagara-wine-region_fodors-travel-publications-inc/925679/#isbn=0307928349 because the request was invalid.

This might be because the link was created a long time ago. Try your search again on Google. That’s all we know.