| A King's Ransom | |
 | |
| Author | Jude Watson |
| Main Setting(s) | Florence, Lucerne, Basel, Prague |
| Publication date | December 6, 2011 |
| Pages | 190 |
| Series | Cahills vs. Vespers |
| Objects to Steal | De Virga Mappa Mundi |
| Preceded by The Medusa Plot |
Followed by The Dead of Night |
A King's Ransom is the second book in the Cahills vs. Vespers series arc, thirteenth in the entire 39 Clues series. It was authored by Jude Watson, who announced it on the Message Board. It was released December 6th, 2011.
Summary[]
"With the lives of their kidnapped relatives on the line, Amy and Dan are given another impossible request--steal a priceless map that's been missing for more than half a century. As the body count rises, Amy and Dan start a frantic search across Europe and through one of the darkest periods of human history. However, the secrets they uncover about the Vespers are nothing compared to the most shocking discovery of all--someone thought to be dead seems very much alive..."