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, 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.

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