Reddit mentions of The Sympathizer: A Novel (Pulitzer Prize for Fiction)

Richard Wright's Native Son is an excellent novel from 1940. Wright was a member of the Communist Party and is one of the canonized greats of African American literature. The main character of the novel is introduced to communism, which is instantly regarded as the only ideology that has anything to offer the American black community. Really a great read. Amazon link

Last year's Pulitzer Prize in Fiction was won by Viet Thanh Nguyen with The Sympathizer, which is a spy-thriller about the Vietnam War. While Nguyen does eventually criticize the National Liberation Front, he spends a great deal of the novel criticizing American imperialism as well. Nguyen identifies as Marxist, but is taking a fairly balanced approach here, being rather critical of communism in VN after the death of Uncle Ho. Amazon link

I googled 'fictional book about vietnamese soldiers coming to america'

and it came back with this:

https://www.amazon.com/Sympathizer-Novel-Pulitzer-Prize-Fiction/dp/0802124941

Could be it?

>The Sympathizer is a sweeping epic of love and betrayal. The narrator, a communist double agent, is a “man of two minds,” a half-French, half-Vietnamese army captain who arranges to come to America after the Fall of Saigon, and while building a new life with other Vietnamese refugees in Los Angeles is secretly reporting back to his communist superiors in Vietnam. The Sympathizer is a blistering exploration of identity and America, a gripping espionage novel, and a powerful story of love and friendship.

Well, to get you in the mood for Vietnam, a few suggestions:

• Chickenhawk
  
  
• The Quiet American
  
  
• The Sympathizer
  
  
• In Pharaoh's Army
  
  Buy them second hand and pass them on when you're done with them