... most of its chapters read like more polished versions of the reports the organization previously published online. These case studies are characterized by showing the group’s deductive homework—walking the reader through the identification and verification of each tile in a gradually appearing mosaic of proof. Sometimes exhaustive discussion of minutiae is necessary to bolster the credibility of the conclusions asserted—rebuttals to the inevitable question: How can you amateurs, just sitting at computers thousands of miles away, know that? As a result, the book can be dense at times. But at its best, it reads like that moment at the end of Sherlock Holmes stories, when the detective explains to his sidekick, Dr. Watson, how he deduced the solution to a mystery from overlooked and seemingly minor clues..