Characters in The Madness of Crowds

Armand Gamache

Chief Inspector of homicide, forced to protect a speaker whose argument he finds monstrous.

Also in Still Life, The Cruelest Month, The Murder Stone, The Brutal Telling, Bury Your Dead, A Trick of the Light, The Beautiful Mystery, How the Light Gets In, The Long Way Home, The Nature of the Beast

Abigail Robinson

A statistics professor whose data-driven lecture gathers a dangerous following.

Jean-Guy Beauvoir

Gamache's son-in-law and second-in-command, back from Paris.

Also in Still Life, Bury Your Dead, A Trick of the Light, The Beautiful Mystery, How the Light Gets In, The Nature of the Beast, A Great Reckoning, Glass Houses, Kingdom of the Blind, A Better Man

Reine-Marie Gamache

Gamache's wife.

Also in The Murder Stone, The Nature of the Beast, A Great Reckoning, All the Devils Are Here, The Grey Wolf, The Black Wolf, Miss Wolcott's Ghost

Ruth Zardo

The village poet.

Also in Bury Your Dead, How the Light Gets In, The Nature of the Beast, Glass Houses, A World of Curiosities