Book excerpt: A group of U.S. soldiers emailed their observations and experiences from Iraq and their candid opinions on fighting an insurgency. This book is the result. This startling collection of emails is a thoughtful and compelling narrative that carries the reader from the alleys and city streets to the homes of long-suffering Iraqis, and from the soldiers’ concrete bunkers to the “majestic” army base. Along the way, the reader is asked to consider the puzzles posed for a disciplined army engaged with an enemy that hides amid—and indeed, targets—a civilian population.