Right at the start, McKitrick demonstrates that two of the five members of the Parliamentary investigating committee were hopelessly biased by their own previous statements and activities to find in favor of the CRU and its erstwhile director, Phil Jones. (One of them resigned under pressure. The other remains. How probable is it that, by accident, two members with strong bias in the same direction were appointed to an investigative panel of only five members despite there having been strong safeguards written into the selection process?)
Farther along, McKitrick explains exactly why the word "trick" in one famous email is completely irrelevant, but the phrase "hide the decline" is enormously important, exposing intentional effort to hide evidence that undermines the IPCC's entire case that late 20th century warming is historically unprecedented, and therefore the need for any reference to human activity to "explain" it.
And later still, McKitrick demonstrates, with precise documentation, how Jones and other IPCC authors corrupted the peer review process to keep contrary evidence out of the 2007 Assessment Report.
And don't miss Appendix B, a refutation of the IPCC's 2007 Assessment Report's claim that atmospheric "arctic oscillations" explained away the large fictitious warming signal from urban heat island effect and other land use changes.