The implacable inspector Javert in Victor Hugo's Les Miserables is based in part on Joseph Fouche:
"He commenced his career as a revolutionist; voted the death of the king; betrayed the Republic to Napoleon; broke his faith to the usurper, then to the Bourbons; then again to the hero of the Hundred Days; he was venal, mendacious, disloyal, corrupt to the core; and all this he carefully points out to his readers 'in the spirit of candour.' His memoirs are indeed no less amazing than instructive reading, and in them will be found the history of the first Napoleonic Empire with a cynical frankness little less than revolting." - Daily Telegraph
His memoirs were long thought to be fake but modern research has shown these memoirs to be authentic.