"Twelve-year-old twin adventurers Cleopatra and Alexander Dodge are reunited with their father and realize that two family heirlooms reveal the location of a treasure that is their birthright. When they set sail with Captain Tarboro on the Almira, they know they're heading into danger -the ocean is filled with new and old enemies, including their nemesis, the infamous pirate Felix Worley."--from publisher.
Four points ; book 2
Brothers and sisters -- Comic books, strips, etc.
Twins -- Comic books, strips, etc.
Voyages and travels -- Comic books, strips, etc.