Things Korean is a nifty coffee table style book that talks about all sorts of things from clothing, to food to customs.
Rapt in Color is a beautiful book describing how and why traditional Korean textiles were made and by whom.
I have not actually seen or read this book, but Traditional Korean Costume sounds marvelous.
I don’t own this book, but on doing a search, a lot of Korean Americans were choosing their favorite Korean cookbooks, and some of them sounded really terrific except that they either didn’t have pictures (so you could not tell what the final product was supposed to look like) or the instructions were made for people that are already pretty knowledgeable about Korean cooking. So a couple of the reviewers for other books suggested that Practical Korean Cooking is not only authentic recipes, but it clearly shows you in a step by step fashion how to make the dishes, and what they should ultimately look like.
Hanoak is a really great book if you are interested in the architecture of traditional Korean homes.
I have not yet seen this book, but Korea Style looks like a gorgeous book about contemporary Korean architecture.
This book, called American/Korean Contrasts sounds very helpful in learning about the differences between American and Korean culture.
This book, called An Introduction to Korean Culture sounds pretty good too.