Work2025
The Secret of Secrets is a mystery thriller novel by American author Dan Brown and the sixth installment in his Robert Langdon series, following Origin. The book was released on S…
Read and enrich the people, organizations and context referenced in case files.
Explore the cases that include this wiki entry.
No case files include this entry yet.
Investigate this subjectWe're looking for works and people connected to this item.
The Secret of Secrets
Looking for what this connects to.
The Secret of Secrets is a mystery thriller novel by American author Dan Brown and the sixth installment in his Robert Langdon series, following Origin. The book was released on September 9, 2025.
The Secret of Secrets is a mystery thriller novel by American author Dan Brown and the sixth installment in his Robert Langdon series, following Origin. The book was released on September 9, 2025.
As of January 2026, the book has been featured on New York Times' best-seller list for 17 weeks in a row.
Robert Langdon is in Prague with his girlfriend, noetic scientist Katherine Solomon. He attends her lecture on human consciousness. The morning after the lecture, he sees a strangely dressed woman on Charles Bridge. The encounter reminds him of an ominous dream Katherine had during the night, culminating in him evacuating their hotel after suspecting an imminent explosion.
The threat turns out to be false, and Langdon is detained by ÚZSI captain Janáček and his protégé and nephew, lieutenant Pavel, as there actually was a bomb that was disarmed earlier that morning. Janáček thinks Langdon and Solomon staged the incident as publicity for her upcoming book. With US Embassy attache Michael Harris forcing the officers to behave, Langdon tries to prove his and Solomon's innocence by leading them to Crucifix Bastion, where Solomon had a planned meeting with fellow scientist Brigita Gessner. However, the facility appears deserted. Langdon discovers a secret entrance to the lab which he uses to escape Pavel. In Gessner's lab, Langdon finds her corpse and Sasha Vesna, who Gessner brought from a mental health institute in Russia to be her assistant after treating her severe epilepsy with a brain implant.
Unknown to Langdon, Katherine is targeted by a secret group called In-Q-Tel, which is working on an underground facility in Prague codenamed "Threshold", in which Vesna, Gessner, and the U.S. Ambassador Heide Nagel are also involved, and led by former CIA agent Everett Finch. Because Katherine's research into human consciousness overlaps with Threshold's operations, and her outspoken views against ever weaponizing such research, Finch had her upcoming book closely monitored. Katherine was invited to lecture in Prague by Gessner as a pretense to do reconnaissance on the nature of her book and get her to sign a non-disclosure agreement to view Gessner's lab that would also let Finch prevent publication of her book if necessary, though Langdon unknowingly thwarted this plan. After viewing a copy of the book provided by hackers, Finch sees it as a serious threat to Threshold and tries to prevent its publication. To this end, he has hackers infiltrate the publishing house that planned to release it and destroy all digital copies and backups. Two operatives then kidnap editor Jonas Faukman to obtain and destroy the only physical copy and interrogate him to identify any remaining copies before allowing him to escape to track his calls, but are ultimately caught and arrested. The woman Langdon saw on Charles Bridge and the bomb threat was also arranged by Finch to confuse and distract Langdon. Simultaneously, Threshold is targeted by a mysterious person known only as the Golěm who self-identifies as Sasha's protector, and murders both Gessner for experimenting on her and Harris for spying on her for Nagel, then goes after Threshold itself.
While breaking into Gessner's lab to get more information on Threshold, the Golěm kills Janáček. Pavel accuses Langdon, who escapes with the help of Sasha. When they hide in her apartment, the Golěm leaves a note claiming to have taken Katherine to get Langdon away from her so she can be successfully hidden. Evading Pavel, Langdon follows the note to Petřín Tower, where using a tourist's phone, he finds a coded message from Katherine that leads to her location at the Klementium. With Pavel closing in, Langdon is forced to burn the last copy of the book to set off the fire alarms, buying them enough time for Nagel's men to intervene.
The two are rescued by Nagel's men, who arrest Pavel and bring them to her. On the way, Katherine tells Langdon what her book is about: possible proof of the existence of non-local consciousness, the fact that the mind is completely opened in the moments before death, and that everyone's consciousness lives on after death as a universal whole, although this doesn't explain why her book was targeted. Langdon also reveals his discovery of an audio surveillance device in the flowers in their hotel room sent by the US Embassy, which was how they were able to recreate Katherine's dream. At Nagel's residence, she tells the two that Finch is coming to speak to them and requests they sign non-disclosure agreements to make anything discussed during the conversation instantly classified, which Langdon realises are a trap to ensure Katherine is legally forbidden from publishing her book. When Nagel leaves them to make a call, Langdon calls Faukman, who confirms Katherine's book is being targeted by the CIA, who Nagel used to work for as an attorney. However, when Nagel learns about Harris' death, she decides to help them against Finch, revealing he forced her into her position as a puppet for the CIA to help in the creation of Threshold under threat of being framed for treason. Doubting they would be able to outmanoeuvre a CIA veteran like Finch, they decide to infiltrate Threshold to obtain incriminating evidence they can use to as leverage against the CIA. Nagel helps them leave the residence undetected, but returns to the embassy after being told that Harris's killer left a note for her which directs her to a YouTube video of Gessner being tortured and confessing everything about Threshold and those involved. She tries to blackmail her former boss at the CIA, getting her detained as he tries to contain the video, though she is able to smuggle a copy out of the embassy with the help of a trusted aide.
Langdon and Katherine find their way into the center of Threshold through a secret entrance in Gessner's lab. In the massive underground complex underneath Folimanka Park, they learn that Threshold has experimented on people with epilepsy, like Sasha and an
Source: The Secret of Secrets (novel) (CC BY-SA)
We label verified structured information, user opinions, and AI-discovered relationships separately.
Be the first to comment.
