For more understanding of social networks security, we advise you to read the following:

1. "Social Media Security: Leveraging Social Networking While Mitigating Risk” by Michael Cross
2. “Security, Privacy, and Anonymization in Social Networks: Emerging Research and Opportunities” by B. K. Tripathy and Kiran Baktha
3. “Online Social Networks Security: Principles, Algorithm, Applications, and Perspectives” by Brij B. Gupta and Somya Ranjan Sahoo
4. “Security and Privacy in Social Networks” by Yaniv Altshuler, Yuval Elovici, Armin B. Cremers, Nadav Aharony and Alex Pentland