Captured in Colombia - The Parker twins travel to Colombia, where their Uncle Pete is kidnapped by Colombian guerrillas.  The twins must not only decide whether they can trust a new friend, they also have to find Uncle Pete before a nearby volcano erupts.    $6.99

Cave of the Inca Re - Traveling with their uncle to Bolivia sounded like fun to thirteen-year-old twins Jenny and Justin Parker.  But when they get tangled up with some smugglers, the twins’ only escape may be the cursed Cave of the Inca Re.  Is God strong enough to save them from the curse?  $6.99

Race for the Secret Code - When their father is accused of selling defense information to a Middle Eastern terrorist, Justin works to prove his father's innocence while Jenny struggles to understand the dilemma that throws their family into grave danger.  $6.99

Jungle Hideout - The Parker Twins travel to an oil field with their uncle, only to find themselves in the middle of a dangerous DEA investigation. It isn't long before Justin and Jenny realize that scorpions, tarantulas, and jaguars are the least of their concerns.  $6.99

Mystery at Death Canyon - Visiting an Indian reservation in eastern Montana, the twins see what appears to be the ghost of Chief Thunderbird riding across the night sky.  But when they investigate, they find chilling answers-and life threatening danger.  $6.99