Twins Jack and Mary are ready for their second fantastic voyage into the past… 

1656 - an island in the Caribbean.

This time they're Joaquín and María, hoping for a great adventure with daring sea voyages, pirates, and buried treasure. But they've forgotten that everything they live through is real. Jack is forced to walk the plank and Mary is set to be sold as a slave, before both kids fight free to reach the island called Crossbones Key. 

The island's secrets can only be uncovered by a talisman of fingerbones in the shape of an X, also called the Crossbones Key. When the pirate crew mutinies against its crazed captain and an all-out war erupts for the island's treasure, the kids have to solve the secrets of both keys or be lost forever.

$9.95 from iUniverse.

And don't miss the first book in this series, The DNAgers™ 1: The Legend of the Crimson Gargoyle.