Levi tuli tunnetuksi ensimmäisellä teoksellaan Gambling with Truth, jossa hän tarjoaa tietoteorian päätösteoreettisen muotoilun, joka soveltaa klassista pragmatismia, kuten William Jamesin ja C. S. Peircen ajattelua.
Teoksia
Gambling with Truth Knopf (1967)
The Enterprise of Knowledge: An Essay on Knowledge, Credal Probability and Chance, MIT (1980)
Decisions and Revisions, Cambridge University Press (1984)
Hard Choices: Decision Making under Unresolved Conflict, Cambridge University Press (1986)
The Fixation of Belief and Its Undoing: Changing Beliefs Through Inquiry, Cambridge University Press (1991)
For the Sake of the Argument: Ramsey Test Conditionals, Inductive Inference and Nonmonotonic Reasoning, Cambridge University Press (1996)
The Covenant of Reason: Rationality and the Commitments of Thought, Cambridge University Press (1997)