400. That’s an error.

Google cannot redirect you to https://www.abebooks.com/Alongshore-Stilgoe-Professor-John-R-Yale/21190511264/bd?cm_mmc=gmc-_-new-_-PLA-_-v01 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.