original_query: What is the main focus of the book "Prey: Immigration, Islam, and the Erosion of Women's Rights" by Ali?
query: What is the main focus of the book "Prey: Immigration, Islam, and the Erosion of Women's Rights" by Ayaan Hirsi Ali?
answer: The book focuses on the migration from Muslim countries to Europe during the European migrant crisis and how this coincided with rising levels of sexual violence against women in the receiving countries.  It also discusses how governments, law enforcement, and feminists appear to suppress attention to the issue of illegal immigration.