IF you haven't seen them on the television or come across their interviews on the radio or in newspapers and magazines, then you've almost certainly seen their work as your eyes scan the climate change section in your local book store or library.
They are the authors of books claiming to reveal the “real truth” about global warming and climate change - that it's either all a hoax, that it's overblown bad science from green ideologues or an elaborate illusion and wrongheaded nonsense.
You might have been intrigued by titles like “An Appeal To Reason: A Cool Look At Global Warming”, “The Climate Caper” or the subtle sledgehammer that was “Global Warming and Other Bollocks”.
But new research into the origins and authors of more than 100 of these climate science denial books finds almost all of them - about four out of five - are largely the products of conservative-leaning think tanks.
The research finds the books avoid traditional academic peer-review and are often written by non-experts. Dr Riley Dunlap, of Oklahoma State University, and Peter Jacques, of the University of Central Florida, have published their research - Climate Change Denial Books and Conservative Think Tanks: Exploring the Connection - in the journal American Behavioural Scientist.