Much of the data Crichton uses backs up his belief that the global warming hysteria is just that, hysteria. At the end of the book he has two essays describing his belief on global warming and pseudo-science in general. They are somewhat interesting. For someone who studied history they show a good correlation between other 'fads' previously touted as science.
In general this book would be a good vacation read. It's not intellectual fertilizer, but will keep you interested enough on a long plane flight or a nice day at the beach to keep you turning pages. There are enough questions raised to perhaps make you at least question some things you hear in the media without blindly accepting it as truth.
In the end, shouldn't we at least question all things we see or are taught as rock hard science?
For more reading, visit The Age of Reason