A friend lent me a book over the Christmas/ New Year break which I found to be fascinating reading."Unstoppable Global Warming Every 1,500 Years" was written by S. Fred Singer and Dennis T. Avery in 2007 with an updated edition published in 2008.
There is so much material in this book. If you have doubts about whether global warming or climate change are man-made, you will find this book a real eye opener. Although this book is written by scientists, it is written with a minimum of jargon so that any reasonably educated adult can understand. The authors are undoubtedly deniers of the man made climate change argument. The theme of this book is that there is a solar/ celestial cycle which recurs roughly every 1,500 years and that these influences are much stronger than anything man has done to this planet.