The list author says: "Let the hunt begin. During the reading of their grandmother's will, Dan and Amy Cahill learn that the secrets to their family's power is hidden in the form of 39 Clues around the world. This interactive new series allows readers to collect the cards, win the game, and win the prizes."
"Dan & Amy Cahill thought they were ordinary kids. Until they found out they were related to the most powerful men and women in history - including Benjamin Franklin! Now they have to travel from Boston to France in search of their first clue!"
"Amy and Dan Cahill are spotted on a train, hot on the trail of a clue left behind by Wolfgang Amadeus Mozart himself! But they are not the only ones on the way to Austria - their competition is still hot on their heels..."
"Amy and Dan are on the trail of the fourth Clue, but their ruthless relatives will stop at nothing to eliminate them from the competition. Their hunt leads them to an ancient city in Egypt that has been a hot bed of Cahill activity for centuries."
"Amy and Dan have been found unharmed! But perhaps not for long - the ruthless Irina Spasky is right on their tail. Book 5 takes Dan and Amy on their most dangerous quest yet as they travel Russia: a Lucian stronghold. Not only are they searching for a clue this time, but they also hope to find the truth about their parents' deaths."
"The 39 Clues series gets treacherous. Book 6 takes Amy and Dan across oceans to Australia on the trail of the famous aviator Amelia Earhart. But as the hunt grows more dangerous, Amy & Dan are realizing that not all of the players will make it out alive..."
"Which branch of the Cahill family do Amy & Dan belong to?! As Amy & Dan travel to Africa to search for the next clue, they find out more about their murky past and Amy starts to remember what really happened to their parents years ago..."
"Amy and Dan must explore an ancient culture and steal a Clue guarded by 1000s of the world's best-trained soldiers. It's the most dangerous Clue search yet. As their enemies crowd in, Amy and Dan find themselves separated for the first time ever. The choice lies before them Â find the next Clue, or find their way back to each other."