Twelve-year-old twins Bickford and Rebecca Kidd and their two older siblings travel to Africa to track down priceless artifacts that will keep the family's treasure hunting business afloat long enough to rescue their kidnapped mother--and possibly find their missing father--

When they uncover a conspiracy against America and its fundamental freedoms, the Kidd children, accompanied by their great uncle, crisscross the country in a race to prove that a newly-discovered copy of the Bill of Rights is a forgery.

Twins Bick and Beck Kidd and their family of professional treasure hunters race against mercenaries, rival treasure hunters, and a lumber baron through the jungles and mountains of Peru in search of Paititi, the legendary lost Inca city of gold, in hope of conserving the archaeological treasure and preventing deforestation of the rain forest.

Eighteen-year-old twins Becca and Cassie, now trained, fearless fighters, hold the key to defeating the despotic United regime and freeing the people of the former United States, but at what cost?

The City of Lights sets the stage for romance, drama and intrigue in the latest Confessions novel from the world's bestselling mystery writer!
After investigating multiple homicides and her family's decades-old skeletons in the closet, Tandy Angel is finally reunited with her lost love in Paris. But as he grows increasingly distant, Tandy is confronted with disturbing questions about him, as well as what really happened to her long-dead...

Tandy Angel is, along with her brothers, a suspect in their parents' murder but having grown up under Malcolm and Maud Angel's perfectionist demands, Tandy decides she must clear the family name no matter what.

When their ship, the Lost, explodes, Bick, Beck, Tommy, and Storm are stranded on a raft in the middle of the Mediterranean Sea, but the situation worsens when the treasure hunters kidnap their parents, forcing the Kidd siblings to follow clues around the globe to uncover an ancient treasure and save their family.