Characters in The Secret of Secrets

Robert Langdon

Harvard symbologist who is in Prague with Katherine and is pulled into the search for her after she disappears.

Also in Angels & Demons, The Da Vinci Code, The Lost Symbol, Inferno, Origin

Everett Finch

Former CIA operative who heads In-Q-Tel and oversees a secret underground research facility beneath Prague.

Katherine Solomon

Noetic scientist and Langdon's partner, about to publish a book with startling claims about human consciousness.

Also in The Lost Symbol

Brigita Gessner

Prague neuroscientist who runs a private laboratory at the Crucifix Bastion and works on brain implants.

Sasha Vesna

Young woman brought from Russia to Gessner's laboratory, where she was treated for severe epilepsy with a brain implant.

Jonas Faukman

Editor of Katherine's book, who is anxious for news when she goes missing.

Also in The Lost Symbol

Heide Nagel

United States ambassador in Prague and former CIA attorney with ties to the secret facility.