A few of the sections from my book with co-author Shannon Combs-Bennett addresses special issues related to international/intercountry adoptions.
Most of the book is US-centric (where Shannon and I live and have most of our experience). Some of the issues we address in the book are not country-specific, though, like issues we address related to the emotional aspects and moving forward with communication.
As DNA testing options expand, the use of DNA testing for the purpose of family searches will grow as well.
I recently received an email from someone living in Europe who was adopted out of the US state of New York. Here is how I addressed his question.