ETHAN AND ALLY
Meet the twins, Ethan and Ally Coble. The twins moved from Colorado a few years ago with their parents and their dog, Butch. Their parents bought a house on the St. Johns River in western Volusia County. When the twins 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.

LAUREN AND ZACK
The most interesting thing the Coble twins have done since arriving in Florida is to make friends with Lauren Lambert and her younger brother, Zack. The Lamberts live in a big 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 mobile phone. The pager and mobile phone are for emergencies, so she can reach her brother or babysitter in case she gets into a jam. Because Lauren is in a wheelchair, she found herself in a quandry when the gang decided to make their clubhouse in the attic of the inlet house. Lauren's dad had installed an elevator in the inlet house so Lauren could get to her bedroom on the second floor. But the elevator did not go past the second floor and up to the attic. Special arrangements had to be made. That's where Captain Wellington comes in.

CAPTAIN WELLINGTON
Captain Wellington, a gray-haired and bearded sea captain lives in an old house with a dock at Ponce Inlet, not far from where Lauren and Zack Lambert live. Captain Wellington knows a lot about the old days, and he likes to talk about history. The captain designed a platform alongside the stairway in the Lambert's inlet house so Lauren could get her wheelchair up to the clubhouse. Since he is British, the captain calls the platform a "lift". Lift is what the British call an elevator. Now Lauren can travel easily up to the Half-Moon Hideaway. The Trackers named their clubhouse after the semi-circle shaped window on the eastern wall. The window looks across some house tops and out to the Atlantic Ocean.

NIKI, THE BABYSITTER
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 Trackers always seem to find mysteries to solve. That's why they call themselves 'The Trackers', because they track down clues to solve mysteries. Often, the clues lead to stories about history. Since Niki studies history in college, she comes in pretty handy at helping to solve the mysteries, plus, Niki has her driver's license! Niki likes to drive the Trackers around in a big van that belongs to the Lambert family. So even though Lauren, as the oldest Tracker, is the leader of the club, Niki is an honorary member.

MIKO AND MRS. PERRY
Miko Perry is a friend of the Trackers. Miko moved to the United States from Japan. Sometimes he helps the Trackers solve mysteries without even knowing it. He just seems to pop up from time to time when the Trackers are tracking clues. Miko's mother, Mrs. Perry, is a marine biologist. She studies life in the ocean. She's the one who taught the Trackers about jellyfish and other sea life.