Doublecross (series) facts for kids

The 39 Clues: Doublecross is the fourth exciting series in The 39 Clues book collection. It was published between 2015 and 2016. This series follows the Cahill family as they face big challenges and disagreements among themselves.

In the first book, Mission Titanic, Ian Kabra becomes the new leader of the Cahills. Dan and Amy decide to take a break from their Cahill duties after almost losing their lives fighting a group called Pierce and his thugs. Ian believes he is a better leader than Amy and Dan. However, it seems many Cahills do not fully accept Ian as their leader.

Ian suspects that some Cahills are planning to take over his leadership. When this plan happens, Ian Kabra and Cara Pierce are forced to leave the Cahill home in Attleboro, Massachusetts. The person leading this takeover is called the Outcast. He plans to recreate some of history's worst disasters. He wants to test if the Cahills are still worthy leaders. The Cahills must try to stop these disasters.

Throughout the series, the Cahills make surprising discoveries. They learn unexpected things about Grace, a powerful Cahill ancestor. They also find out that the Outcast is Nathaniel Hartford, Grace's husband, who was thought to be gone. There are four books in this thrilling series.

Famous Disasters in Doublecross

The disasters in the Doublecross series are based on real-life events. Here is some information about a few of them:

Mission Titanic: A Double Disaster

This book combines two real-life tragedies. One part is based on the famous RMS Titanic. This huge ship hit an iceberg on its first trip and sank, leading to many deaths because there weren't enough lifeboats.

The book also focuses on the Halifax Explosion from 1917 during World War I. In real life, two ships crashed in Halifax, Canada. One ship, the Mont Blanc, was carrying tons of explosives. When it crashed, the explosives blew up. This caused a massive explosion that shattered glass, turning it into dangerous flying pieces. Many people were blinded, injured, or killed. This event happened at 8:45 in the morning. Around 2,000 people died, and about 9,000 more were hurt.

In the book, Amy and Dan, along with their cousins and friend Cara Pierce, must get on a ship called the Aurora. They need to remove tons of explosives from the ship without the owner harming them. They soon realize they are facing a disaster as big as the Titanic's sinking.

Mission Hindenburg: An Airship Tragedy

On May 6, 1937, the LZ 129 Hindenburg, a large German passenger airship, caught fire and exploded. This happened while it was trying to land in New Jersey. The Hindenburg disaster killed 36 people.

In the book, the Outcast blows up a Lucian airship. This explosion also kills 36 Lucians. Sadly, the Cahills were not able to prevent this disaster from happening.

Mission Hurricane: Saving a Country

In 2005, Hurricane Katrina hit the city of New Orleans. Its strong winds and rain broke the city's protective walls, called levees. This caused massive flooding and led to over 1,800 deaths.

In the book, the Outcast tries to create a huge tsunami. He detonates a nuclear bomb off the coast of the Netherlands. He hopes to flood the entire country. However, the Cahills manage to close the country's protective gates. This action saves the Netherlands from the disaster.

Mission Atomic: The Final Challenge

Information for Mission Atomic is not available here. However, in this book, the Outcast plans to recreate the disaster that happened at Chernobyl, Ukraine.

Mission Hurricane Book Details

Mission Hurricane is the third book in "The 39 Clues: Doublecross" series. Jenny Goebel wrote this book. It was released on January 26, 2016.

The book cover is green. It has a yellow oval that says "The 39 Clues." The cover also shows the skyline of a modern city. This city is likely Rotterdam, Netherlands, which is a large port. You can also see lightning striking the city and foamy waves in the front.

The book before Mission Hurricane was Mission Hindenburg. The next book in the series is Mission Atomic. In Mission Atomic, the Outcast plans to recreate the Chernobyl disaster.

The note at the end of Mission Hurricane reads: "My fellow ‘lost’ dragons: The science is sound. It will be a Level 7 event. The fire we breathe will scorch the whole world. -NH" The letter also shows the Ekat symbol, which is a white dragon on a yellow crest. "NH" stands for Nathaniel Hartford, who is revealed to be the Outcast.