David Hume (1711–1776) is a classic author whose works are in the public domain.

Hume's philosophical inquiry challenges how we know anything at all, arguing that reason has narrower limits than we assume and forcing readers to reconsider the foundations of their own certainties.

Hume's revolutionary treatise dismantles the foundations of human knowledge and logic, arguing that everything we think we know is built on habit and custom rather than reason. This philosophical bombshell remains profoundly unsettling because it exposes how fragile our certainties really are.