Works attributed to Seneca include a dozen philosophical essays, one hundred and twenty-four letters dealing with moral issues, nine tragedies, and a satire, the attribution of which is disputed. His authorship of Hercules on Oeta has also been questioned.
- De Providentia (On providence) - addressed to Lucilius
- De Constantia Sapientis (On the Firmness of the Wise Person) - addressed to Serenus
- De Ira (On anger) – A study on the consequences and the control of anger - addressed to his brother Novatus
- Ad Marciam, De consolatione (To Marcia, On Consolation) – Consoles her on the death of her son
- De Vita Beata (On the Happy Life) - addressed to Gallio