Wills, Aidan, and Benjamin S. Buckland. Access to Information by Intelligence and Security Service Oversight Bodies In Geneva: DCAF., 2012.

"Financial Oversight of Intelligence Services." In Overseeing Intelligence Services. A Toolkit, 154. Geneva: DCAF, 2012.

Wills, Aidan. Guidebook: Understanding Intelligence Oversight. Geneva: DCAF, 2011.

Born, Hans, Ian Leigh, and Aidan Wills. International Intelligence Cooperation and Accountability . London: Routlege, 2011.

Wills, Aidan, and Mathias Vermeulen. Parliamentary Oversight of Security and Intelligence Agencies in the European Union. European Parliament Study, 2011.

Wills, Aidan, Mathias Vermeulen, Hans Born, Martin Scheinin, and Micha Wiebusch. Parliamentary Oversight of Security and Intelligence Agencies in the European Union . Brussels: European Parliament, Directorate General for Internal Policies, 2011.