Seven Wonders #1: The Colossus Rises by Peter Lerangis

Before he knows it, Jack is kidnapped from a hospital and wakes up on a tropical island. He is met by three other kids who also have blond, upside-down V's on the backs of their heads. It is the sign of the royal family from the lost city of Atlantis and means they also have special powers. The kids have unique DNA that takes their best talents and makes them stronger. However, it will also kill them if the don't receive regular treatments. Jack's talent isn't clear, but he leads the group to Greece in search of a Loculus from Atlantis. The seven Loculi are the source of their powers and may save their lives. However, the Loculus is being guarded by a mythical beast, and a radical group is searching for it too.

This series is in the same style as the Percy Jackson books in that the kids are descendants of gods and are learning to use their new powers. Each book consists of a quest. This series is unique, because the kids will die if they don't return to the island for treatments. This book adds an interesting character named Torquin. He is over seven feet tall, weighs over three hundred pounds, and is supposed to protect the kids. However, the kids create problems for him, sometimes on purpose, so he  has a like/hate relationship with them. The plot includes codes, mazes, and adventures that keep it interesting.