Interaction between unrelated members of the opposite sex is inevitable at times. Yet, questions about whether or not it is permissible, and if so, to what extent, need to be asked. Are Muslim men allowed to interact with female students in a virtual classroom, and vice versa? Can Muslim women pursue a professional career which necessitates their interaction with men? Is it appropriate for a woman to serve her husband’s guests? Do segregated wedding ceremonies comply with the Sharia? At times like these, one searches for a text that addresses these contemporary issues, based on the Qur’an and the Sunnah. Dr. Hatem al-Haj has taken a broad view of the subject, keeping in mind the opinions of both categories of scholars: the ones who have taken a stricter stance and the ones who are more flexible in their interpretation. This is a comprehensive and well-researched work, filled with practical advice, from which students and professionals, both male and female will benefit immensely.