Highly recommended: Mark Steyn's "A Disgrace to the Profession", to anyone interested in the genesis of Michael Mann's Hokey Stick. Steyn's book is not an attack on the idea of AGW, it's an exposé of, arguably, the biggest scientific fraud since Piltdown; and, indisputably, the most consequential.
Using the words of scientists who strongly believe AGW is true and of those who are more skeptical, it lays out a convincing case that there are differences of opinion among scientists on AGW, if not so much about Michael Mann.
If you (mistakenly) conflate Mann's agenda with the discipline of climate science, you will like the book still less than even Mann's “allies” like him. That doesn't mean you shouldn't read it: If you are concerned about erosion of public support for “doing something” about AGW, you should read it so you can help climate science regain a modicum of respectability. As long as Mann is left to hijack the discussion, threaten the careers of distinguished scientists and subvert the peer review process, it is unlikely reasonable people will find any common ground on the topic.
Mann has been able to force the entire discipline of climate science into a corner where failure to defend his work is equated with failure to defend, in Mann's words, “the cause.” A strange way for a scientist to think. If there is a single principle that distinguishes science from religion it is that scientific theories are falsifiable. Mann is pushing the religion of Mann, not the science of climate study.
The damage to science itself is profound. The damage to freedom of speech is, perhaps, even worse - which is how Steyn got involved in a lawsuit. And came to write this book. The First Amendment is as much subject to Mann's attack as is the scientific method.
I consider myself well informed on the AGW debate, but I learned quite a bit from this book. You probably will too. This book does not deny AGW, it denies Michael Mann's devious, unprincipled, ad-hominem attacks on those who dare ask a single question.
We're being asked to restructure the world economy because of a drawing based on misrepresentation, willful hyperbole and astounding arrogance. You should read "A Disgrace to the Profession" in order to understand what that means, whatever your position on AGW. You should buy "A Disgrace to the Profession" (also at Amazon) because doing so helps defend free speech. Even if Mann were right, it is long past time his bullying lawfare was stopped.