Meet the twins, Ethan and Ally Coble.

The twins moved to Florida from Colorado a few years ago with their parents and their dog, Butch. Their parents bought a house on the St. Johns River in Volusia County.

When the Cobles arrived in Florida, they soon began to discover fascinating facts about their new state. They learned about roaches, armadillos and jellyfish. They discovered a historic lighthouse at Ponce Inlet and a fun, historic ballpark at City Island in Daytona Beach.

One summer, they learned how to stay safe in Florida's storms.

Ethan and Ally Coble

Lauren and Zack Lambert

The Lamberts live in a big old house in the town of Ponce Inlet with their dad and their dog, Salty.

Lauren Lambert is in a wheelchair, and she is very resourceful. She has a laptop computer, a pager and a cell phone. The pager and cell phone are for emergencies, so she can reach her brother or sitter in case she gets into some trouble when she is alone.

Because Lauren is in a wheelchair, she found herself in a quandry when the Trackers decided to make their clubhouse in the attic of the inlet house.

Ethan and Ally spend most of their spare time at the inlet house with Lauren and Zack.

Mr. Lambert, Lauren and Zack's dad, is hardly ever home. He travels a lot with his job, so Niki lives at the inlet house and looks after all four kids, which keeps her very busy. You see, the group always seem to find themselves solving mysteries. That's why they call themselves "The Trackers," because they track down clues to solve mysteries.

Usually, the clues involve history. Since Niki studies history in college, she comes in pretty handy at helping solve the mysteries. In addition, Niki has her drivers license!

Niki likes to drive the Trackers all over the place in a big van. So even though Lauren, as the oldest Tracker, is the leader of the club, Niki is an honorary member.

Niki, the Sitter