Sean Yeager Claws of Time - engaging action adventure for ages 8 to 12

 While living with their mothers at a luxurious mansion in England, Sean and Emily become bored and search for clues about their missing fathers - lost in action working for the Foundation of International Technology. They discover a photograph linking Sean’s father with Major Clavity, a Foundation Agent, and resolve to contact him. They also find an Egyptian papyrus and a lucky pebble, which they believe is a memory crystal. While returning to school, against Sean’s wishes, they are ambushed, rescued and given the choice of helping to find the now missing Major Clavity or returning home. They choose the mission.