Are you ready to save the world? The bestselling series returns with an adventure spanning 6 explosive books, 2 secret-filled card packs, and a website that places readers right in the action. Thirteen-year-old Dan Cahill and his older sister, Amy, thought they belonged to the world's most powerful family. They thought the hunt for 39 Clues leading to the source of that power was over. They even thought they'd won. But Amy and Dan were wrong.One by one, distress calls start coming in from around the globe. Cahills are being kidnapped by a shadowy group known only as the Vespers. Now Amy and Dan have only days to fulfill a bizarre ransom request or their captured friends will start dying. Amy and Dan don't know what the Vespers want or how to stop them. Only one thing is clear. The Vespers are playing to win, and if they get their hands on the Clues . . . the world will be their next hostage.

This book consists of articles from Wikia or other free sources online. Pages: 508. Chapters: Ekaterina, Janus, Lucian, Madrigal, Tomas, Branch Crests, Branch Leaders, Cahill Timeline, Cahill Web, Cards, Ekaterina Branch, Historic Cahills, Jane Cahill, Janus Branch, Janus Serum, Lucian Branch, Madeleine Cahill, Madrigal Branch, Madrigal Gauntlet, Serum Formula, The Cahill Family, The Cahill Fire, The Sword Thief, Tomas Branch, Wiki Team Win History-Round 2, 39 Clues - Search for the Keys, A-Star, Adolf Hitler, Agents Kidnapped in The Medusa Plot, Agent Cards, Agent Handbook, Alistair Oh, Alistair Oh's Alliances, Amber, Ana Kosara, Anne Cahill, Arena 39, Bae Oh, Beyond the Grave, Branch Crests, Branch Founders, Branch Leaders, Branch Serums, British Museum, Buchanan Holt, Cahills vs.Vespers, Cahill Island, Ireland, Cahill Timeline, Cahill Web, Cairo, Egypt, Cards, Card Chart, Casper Wyoming, Characters, Charlie Wallace, CliqueMe, Clues, Clue Symbols, Damien Vesper, Darma, Ekaterina Branch, Ekaterina Serum, France, Gideon Cahill, Gordon Oh, Grace's Will, Hae-In Oh, HALO, Historic Cahills, Hot Spots, Hydrogen, Ian and Natalie's Alliances, Into the Gauntlet, In Too Deep, Jude Watson, Katherine Cahill, Lab Rat, Leslie D. Mill, Lin Kim Oh, List of Main Characters, Loch Ness, Loch Ness Submersible, Mace, Madeleine Cahill, Madrigal Gauntlet, Margaret Peterson Haddix, Marie Curie, Master Serum, Mercury, Microwavable Burrito, Missions, Myrrh, My Cards, My Clues, Ned Starling, Neuschwanstein Castle, Nikola Tesla, Old 39 Clues Wiki Teams, Olivia Cahill, One False Note, Phosphorus, Pierre Curie, Prestige Meter, Quote of the week suggestion page, Robert Cahill Henderson, Rosetta Stone, Scotland, Serum Formula, Sharable Card Codes, Silver, Sinead Starling, St. Petersburg, Storm Warning, Strongholds, Ted Starling, Teodora Kosara, The 39 Clues, The 39 Clues, The 39 Clues Website, The Bermuda Triangle, The Black Book of Buried Secrets, The Black Circle, The Cahill Family, The...

After delivering the last ransom, Amy and Dan discover that Vesper One has a terrifying plot and they race against time to stop him from harming millions of innocent people.

The explosive finale to Scholastic's mega-selling series. Throughout the hunt for the 39 Clues, Amy and Dan Cahill have uncovered history's greatest mysteries and their family's deadliest secrets. But are they ready to face the truth about the Cahills and the key to their unmatched power? After a whirlwind race that's taken them across five continents, Amy and Dan face the most the difficult challenge yet - a task no Cahill dared to imagine. When faced with a choice that could change the future of the world, can two kids succeed where 500 years worth of famous ancestors failed?

A guide to the characters and situations in "The 39 Clues" outlines the Cahills' secrets, including hidden facts, strategies, agents, lost founders, secret bases, and scandals, as well as information about all branches of the family.

C.1, GENERAL FUNDS, SAM'S, 3/23/2010, $12.99.