Some book titles to get you started. This is not an exhaustive list!
Scandinavia during the Second World War
Nissen, Henrik S., 1983.
The Americanization of Europe: culture, diplomacy, and anti-Americanism after 1945
Stephan, Alexander, 2006.
His name was Raoul Wallenberg: courage, rescue, and mystery during World War II
Borden, Louise, 2012.
Svenskar i strid mot Hitler: i amerikansk krigstjänst, 1941-45
Gyllenhaal, Lars, 2018.
Sweden after Nazism: politics and culture in the wake of the Second World War
Östling, Johan, 2016.
Growing up in Sweden: in the shadow of World War II
Setterdahl, Lilly, 2008.
Jumpin' Jimminy - a World War II baseball saga: American flyboys and Japanese submariners battle it out in a Swedish world series
Skole, Robert, 2004.
American women and Swedish women changes since World War II
Reinartz, Kay Frances, 1973.