Third Culture Kids: The experience of growing up among worlds
By David Pollock & Ruth Van Reken
This books speaks to the challenges and rewards of multicultural childhood: the joy of discovery and heartbreaking loss, its effect on maturing and personal identity, and the difficulty in making the transition home. A must for those with kids, or working with parents, overseas.

Strange Virtues: Ethics in a Multicultural World
By Bernard Adeney
One of the first books to comprehensively consider ethics across cultures, addressing the ethical import of other religions and gender relations, exploring how the Bible and culture interact to produce ethical stances, and examining such particular case studies as bribery. Valuable for anyone working cross-culturally.

Cross-Cultural Conflict: Building Relationships for Effective Ministry
By Duane Elmer
Conflict is inevitable, the question is How do we handle it? And here Christians from different cultures disagree. All point to the Bible to back their position. What do we do? This book provides a model for getting to cultural values and resolving conflicts.