Minutes before she died Grace Cahill changed her will, leaving her decendants an impossible decision: You have a choice - one million dollars or a clue.

Amy and Dan Cahill are spotted on a train, hot on the trail of one of 39 Clues hidden around the world. Police report a break-in at an elite hotel, and the suspects sound suspiciously like Amy and Dan. When there's a Clue on the line, anything can happen.

ATTENTION Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair Oh. Could they have been foolish enough to make an alliance? Spies report that Amy and Dan seem to be tracking the life of one of the most powerful fighters the world has ever known. If this fearsome warrior was a Cahill, his secrets are sure to be well-guarded . . . and the price to uncover them just might be lethal.

A Clue found in Japan has Amy and Dan jetting off to Egypt to find out just what's behind the fierce rivalry between the Tomas and Ekaterina branches of the Cahill family. Was a Clue stolen from the Tomas branch? Where is it now? And most important, can Amy and Dan get their hands on it before their rivals do?

JOIN ANYTIME TO PLAY FOR THE CHANCE TO WIN

A hint from their parents\u2019 past puts Amy and Dan on the trail of secrets their grandmother Grace would NEVER have wanted them to know. Awful memories begin to crowd in on Amy, just as her enemies circle closer. How far would she go to protect Dan? How much of a Cahill is she prepared to be? Perhaps Grace was right - some secrets are better left buried.

It's no longer a game. The body count is rising. Shaken by recent events, Amy and Dan flee to a distant land and trace the footsteps of their most formidable ancestor yet: a military leader of mythic proportions. Yet just as the siblings begin to master the art of ancient warfare, they confront a dangerous enemy that can't be felled with a sword: the truth. With the stakes higher than ever, Amy and Dan uncover something so devastating it changes everything - the secret of their family branch.