This book is hugely enjoyable! It is written in a highly accessible style, and yet it is academically rigorous. The author has a profound understanding of the linguistic, social, cultural and psychological aspects of trilingualism and uses her large corpus covering more than 10 years of trilingual interactions in a family setting as an illustration of successful trilingual development. The book reads like a novel: the characters are two determined parents, one Chinese and one Swiss, and two biracial and trilingual boys growing up in New York, proud of their unique identity. The author presents different perspectives: the parents’ view, the children’s opinions about their multilingualism, and the researcher’s perspective. She draws excellent conclusions for prospective parents of multilingual children and has a clear message to those who doubt that multilingualism can work: it is possible, her children developed superior cognitive and communicative skills, but it involves a constant, unrelenting effort from the parents’ part. Dr. Jean-Marc Dewaele, Department of Applied Linguistics, Birkbeck, University of London.