Henry Carter Hull

Siblings Amy and Dan must find out who the Vesper mole is in their innermost circle.

Amy and Dan are separated while trying to retrieve a clue which is guarded by thousands of soldiers and worry they cannot succeed apart.

A hint from their parentś 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.

Amy and Dan Cahill face their greatest challenge on their quest to find the thirty-nine clues, but in order to discover the secrets of their lineage they will have to make a choice that could impact the world's future.

Explores the hidden facts, dangerous missions, top agents, and secret hideaways of the Cahill family's desperate hunt for the thirty-nine clues that will lead them to the secret of world domination.

Thirteen-year-old Dan Cahill and his sister, Amy, figure out Vesper One's endgame and realize they must stop the organization from using their ransoms to harm millions of people.

Ben and his friend Jill find themselves in danger when they discover the secret history of their Massachusetts school and set out to derail a developer's plan to level the building to make way for an amusement park.

Twelve-year-old Teddy Fitzroy is the prime suspect when FunJungle's newly-acquired koala goes missing, thanks to a prank staged by middle school bully Vance Jessup.