There is a very good book by Tim Tzouliadis called “The Forsaken.” It is about the thousands of Americans who were duped into going to the Soviet Union in the 1930s to work in the “Workers’ Paradise.” Most ended up being imprisoned or murdered by the Soviet government.
The father of a friend of mine went with his family to the Soviet Union in 1930 because his father was assigned to a job there. Fortunately, the task he was assigned to do was completed, and they returned after about a year. After reading that book, I realized that the family narrowly avoided a horrific fate.