History books that contain no lies are extremely dull.

The remark is a sardonic comment on the way history is written and consumed. It suggests that narratives of the past become “interesting” partly through selection, simplification, and rhetorical shaping—processes that can shade into distortion or outright falsehood. The line also implies skepticism about claims to perfectly objective historiography: a completely lie-free account might read like a dry inventory of facts, while popular histories often rely on dramatic arcs, heroes and villains, and moral lessons. In that sense, the quote critiques both historians’ temptations to embellish and readers’ appetite for compelling stories over messy truth.