Treasure hunters (James Patterson)

"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"--

Join the Kidds on their trek to exotic Russia and the dangerous Arctic as they outrun the bad guys in their search for stolen treasure. After their adventures in China and Germany, the Kidd family is ready for some rest and relaxation. But when you're an ace treasure hunting team, there's always another adventure waiting around the corner! This time, the Kidds head to Russia where a set of priceless paintings by Leonardo da Vinci and Rembrandt has...

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.

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.