Who's the correct people/group to tell when you find one of these?

In the list of books linked to ISBN 9780375727207(Brian Greene's Fabric of the Cosmos) is listed an edition of Thomas Mann's Magic Mountain.

I know one time I posted one of these in this forum and it got resolved. I don't remember who to tell though.

Use the Contact Us link.  Then "feedback".  Provide all the details of the incorrect link including Title and ISBN of both books.  Good luck!

There are hundreds, perhaps thousands of improper iinkages, and the Team is thankful to us for reporting them. Kellie described the proper way to do it -- I have reported many and always get a PM from the Team thanking me for reporting it and letting me know that they have been unlinked. It only takes a moment to do it and I urge others to  report improper linkages -- it helps all of us!

I have to do this on regular basis and the Team is always quick to reply and fix the incorrect links.