- The Right to Die with Dignity: An Argument in Ethics, Medicine, and Law
- Speech, Media and Ethics: The Limits of Free Expression
- The Scope of Tolerance: Studies on the Costs of Free Expression and Freedom of the Press (Extremism and Democracy)
- Euthanasia in the Netherlands: The Policy and Practice of Mercy Killing
- Confronting the Internet's Dark Side: Moral and Social Responsibility on the Free Highway