Will Peterson Books in Order

Visiting their grandmother in an unwelcoming English village, twins Rachel and Adam encounter an ancient symbol and increasingly strange events. Their investigation into the village’s hidden history uncovers supernatural powers and disturbing questions about their own ancestry.

Rachel and Adam discover that their apparent rescuers at the Hope Project are holding them prisoner. Fleeing across Europe toward Morocco, the twins use their unusual abilities to evade rival pursuers while searching for another piece of an ancient mystery.

After escaping Australia, Rachel and Adam travel to the United States seeking their father and the final triskellion. Clues from their grandmother draw them toward a military base while the Hope Organization pursues them and their mother faces a murder charge.