After consideration

If you wonder why I only put the US Amazon links to my pages, the answer is that as far as I can see from viewing figures, I am the only person in the UK who views this blog and therefore adding the UK links would prove futile.

The vast majority of readers are in the USA and the reason you won't find me linking to FB is because the blog never gets read from those links I supply, again proving my point about are the vast number of groups and links any good?

As far as I can judge they have had no impact on either blog reads or sales.