In an age when shaky images from phone cameras and newspaper reports cite Facebook comments or tweets as a substitute for news - that famous "first draft of history" as it was once known - this remarkably plain-spoken and often unflinching memoir comes as a rare combination of reportage, witness to history, family story and national tragedy.
When mujahideen fighters moved into his neighbourhood in Kabul in 1992 with the attendant factionalism, rocket attacks and gunfire, the author - then just 8 - became one of those many anonymous souls who could, given the opportunity, bring us an unvarnished truth of their experience.
Latterly he became a translator for the American military and here writes in English with such emotional flatness and an eye for detail that we feel this is the authentic voice of the child who was there at his grandfather's compound, which held the extended family, when it was surrounded and the family forced to take flight.
The childhood he evokes before the mujahideen and then the Taliban swarmed across the city seems almost an idyll of respect, faith, youthful games and humour: "Kabul was like a huge garden then."
The large family, overseen by the benign, thoughtful and independent grandfather, face privations then menace. "The time of the Communists had ended, the time of the mujahideen had begun," Omar writes. "When I heard the mujahideen were coming I had expected to see heroes in uniforms and shiny boots. But they were dressed like villagers with big turbans, the traditional baggy pants called shalwar, and the long tunic-like shirts called kamiz. Their waistcoats were filled with grenades and bullets.