Trust No One
Trust No One
Author Linda Sue Park
Main Setting(s) Connecticut
Publication date December 4th
Pages 190
Series Cahills vs Vespers
Objects to Steal The Voynich, folio 74
Preceded by
Followed by
Day of Doom
Trust No One is the fifth book in the Cahills vs. Vespers series (a branch-off series from The 39 Clues). This book was released on December 4th, 2012, and is by Linda Sue Park. This book revealed Vesper Two, The Shield. The characters find out who Vesper Three is.


"When seven members of their family were kidnapped, thirteen-year-old Dan Cahill and his older sister, Amy, got ready for the fight of their lives. But their enemy, a terrifying group known as the Vespers, remained frustratingly elusive. They stay in the shadows, picking off Cahills one by one.

And now the Vespers have landed their most serious blow yet - a blow that strikes at the very heart of the Cahill family. Because Amy and Dan discover that there's a Vesper mole in their innermost circle. Amy and Dan need to smoke out the traitor before the next hostage dies. They have just days to discover who has their back . . . and who wants to sink a knife into it."

"A surprising twist brings Amy and Dan back to New England for their first mission on U.S. soil since the beginning of the Clue hunt. But being close to home is anything but a comfort. The siblings have learned that there's a mole in the Cahill organization . . . and the traitor is one of their closest confidantes. However, this betrayal is overshadowed when Amy and Dan make an even more devastating discovery: the truth about the Vesper's real plan. Burdened with this terrifyng information, Amy and Dan are forced to ask an impossible question: Is it more important to save the hostages . . . or stop the Vespers?"

Other Facts

Linda Sue Park left a message on The 39 Clues Message Board stating this about the book:

"A few tantalizing hints: One part of this book could be subtitled: The Mystery in the Library. Another: Mortal Danger at the Falls. A third: A Nice Walk in the Park—NOT! And did I mention betrayal? (Cue evil laughter…)"


Although there are hundreds of rumors flying around, the top-trending rumor is that Isabel Kabra will be making an appearance. It is widely suspected that Vesper 2 is Isabel Kabra (Note: Vesper 2 was revealed in the "Trust No One" mission on the MB. Due to the fact that some Wiki users have not read and played TNO yet, Vesper 2 will not be mentioned)

Other known hints are that the nation of Brazil as well as the Kabras play an important role. This may lead to the introduction of Vikram Kabra, the father of Ian and Natalie; he escaped to Brazil after Isabel was arrested.


There were no released excerpts of Trust No One.

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