What has the author Ian R K Paisley written?

There seems to be a misunderstanding. There is no author named "Ian R K Paisley." The name "Ian Paisley" is most likely referring to Ian Paisley Sr., a prominent Northern Irish political figure and Protestant fundamentalist clergyman.

He was known for:

* Founding the Democratic Unionist Party (DUP) in 1971: This party advocated for maintaining Northern Ireland as part of the United Kingdom.

* Being a vocal opponent of Irish reunification: He strongly opposed any moves toward a united Ireland and was a fierce critic of the Irish Republican Army (IRA).

* Leading a campaign against the Good Friday Agreement: He initially opposed the 1998 peace agreement that aimed to end the conflict in Northern Ireland.

While Ian Paisley Sr. was a prominent figure in Northern Irish politics, he was not known for writing books. He is best known for his political and religious activism.

If you're looking for information on an author named "Ian R K Paisley", it's possible that you might have misremembered the name or that there is a lesser-known author with a similar name.