Well, I'll come clean and say that I'm not really a great fan of Anne Tyler.
I have previously read 'The Accidental Tourist' and 'Back When We Were Grownups' and found both to have interesting character studies but not a lot else.
'Digging to America' was definitely along the same vein.
I loved the premise of the book - the meeting of two families with very different backgrounds, while both were collecting adopted Korean babies at the airport. Much was also made of the different ethnic origins of the people involved. I was, however, frustrated by the continuous round of parties and celebrations, particularly in the first half of the book, and also by the cast of thousands in the two extended families - a couple of family trees would have been a great help.
The emphasis of the book changes throughout. In the early stages it appears to be a book about the two adopted children. This soon moves to concentrate on the adoptive parents and the bond formed between the two families, ending up with the relationship between the grandparents.
I live in Dubai, surrounded by a melting pot of different cultures and for me the strong part of this book was the study of the extent to which 'foreigners', in this case, Iranians, can, or even want to adopt the ways of their new country. The book seems to suggest that this is a very personal decision and that everyone approaches the problem differently.
Better than the other two Anne Tyler books I've read, but I'd like a stronger story line before I could consider becoming a fan.