Asked to locate a stolen necklace of unusual value, Nancy soon discovers that strange and dangerous people are responsible for the theft.

Shaken by a shocking loss, Amy and Dan flee to an exotic land and trace the footsteps of their most formidable ancestor yet: a military leader of mythic proportions.

The Cahills are the world's most powerful family, but their strength is being tested. A sinister man calling himself The Outcast has targeted the family and set them an impossible test. He's recreating four of history's worst disasters and challenging the young Cahills to find and stop the tragedies before it's too late. Now, with one disaster behind them, siblings Dan and Amy Cahill and their friends have just days to discover what the Outcast's...

"In 1814, redcoats burned the White House to the ground. In 1889, Harry Houdini discovered a trick that would save his life. In 1955, the U.S. launched the world's first nuclear submarine. And one family pulled the strings behind the scenes at each of these events: the Cahills--the most powerful family the world has ever known. Now the Cahills have opened their vault and dangerous secrets are pouring out. This book contains three of them--three stories...

When the creator of a new, popular reality game is kidnapped, Abigail Hunter and her friends go on their first official mission for The Center and if they are lucky they might just save the world.