Hidden immigrants, as the name implies, are people who have returned to their "home" culture after living abroad. They look like and technically are part of the home culture but often they don't feel or often act like part of that home culture. True immigrants are often identifiable by their language, race, or a variety of others things, but hidden immigrants are harder to identify unless they make cultural mistakes.
Hidden Immigrants: Legacies of Growing Up Abroad by Linda Bell shares discussions with 13 adults who grew up overseas. They talk about their home lives, schooling, college, the privileged lives they led, their current jobs, their restlessness, and how living overseas changed their attitudes.
This book was helpful in pointing out some of the things these people struggled with when they returned to their home countries. I am getting a better sense of what to watch for if we are able to live overseas a lot when our children are with us. However, the complaints started to bother me. I am not convinced that there are difficulties experiences exclusively by third culture kids. There are many different reasons why a teenager might not fit in at high school, or why college may be awful, or why a person might want to move a lot.
It was also interesting to note that many (almost all) of the problems these people experienced were somehow related to school. I think their parents could have done a better job of keeping things more consistent with their schooling. The one mention of homeschooling was negative. However, these children were overseas in the 50s and 60s when homeschooling was almost unheard of. Today many people living abroad homeschool their children. As always, homeschooling is not the best choice for every family, but it is certainly something to be considered.