The Sympathizer by Viet Thanh Nguyen

"The Sympathizer" is a gripping spy novel set during the Vietnam War. The protagonist is a half-French, half-Vietnamese army captain who is a communist double agent. After the Fall of Saigon, he moves to America with other South Vietnamese refugees and struggles to reconcile his dual loyalties as he continues to spy on his fellow countrymen in exile. The novel explores themes of identity, war, and politics, while providing a unique perspective on the Vietnam War and its aftermath.

The 420th greatest book of all time