My Parents Go AWOL

Luke and Silena Jackson, the two children of the famous demigods Percy and Annabeth Jackson, have lived the lives ignorant of their divine heritage. When their parents are kidnapped, their world turns upside down when their grandparents from the divine side pops up out of nowhere... literally... When the two siblings reach camp, they're greeted by an amiable son of Apollo and a very temperamental daughter of Zeus who becomes a surprising ally. The four of them along with another demigod, go in pursuit of the missing Jackson parents, having deceit, lies, and disappointment greeting them the whole way there. A simple rescue mission turns into something much bigger than anyone could have imagined.