As part of its Terms of Service, Amazon prohbits competitor links on a book's "primary" page. As LibraryThing derives some of its bibliographic data from Amazon, we have to follow their rules.

To comply with this provision, bookseller links, including your "Quick Links," will only appear on secondary pages, such as "Get this book," "Local Book Search" and "All sources."

For more on this policy see this blog post.

• Availability known
• Item link
• Website or no link