He did, however, write several works, including:
* Daemonologie (1597): A treatise on witchcraft and demonic possession.
* The True Law of Free Monarchies (1598): A defense of the divine right of kings.
* Basilikon Doron (1599): A guide for his son, Prince Henry, on how to be a good king.
* A Counterblaste to Tobacco (1604): A diatribe against smoking.
These works were circulated in manuscript form and were later published after his death.