This timely book contributes to the national discussion of immigration policy, particularly its effects on law enforcement and the police. It examines critical issues in the policing of immigrants, such as do immigrants pose a threat to public safety, are there differences in criminality among immigrant groups, what issues do police face in dealing with immigrants, what are the attitudes of immigrants to the police, are these affected by whether immigrants are legal or illegal, and can police enforce immigration laws and at the same time protect immigrants from discrimination, exploitation, and violence. It is tempting to summarize Sun’s and Wu’s answers, but that would be unfair. They deserve full credit for having the courage to raise these controversial issues and examining them with compelling scholarship and insight. So instead, I shall highlight elements in their presentation. The heart of their analysis is an examination of the experience and attitudes of three distinct immigrant groups—Latinos, Chinese, and Arabs. Although the authors carefully discuss the histories of each group in the United States, they concentrate on new immigrants largely from the 1990s and early years of the twenty-first century. Similarly, their research draws mostly on scholarly studies and surveys from these same years.