Simply Audiobooks Inc.

Airman is set in the 1890's on the sovereign Saltee Islands, off the Irish coast. It is the story of Conor Broekhart, a young Saltee Islander whose father, Declan, is the King's bodyguard. When Conor discovers that the power hungry Marshall Hugo Bonvilain is organizing a military coup, the king is murdered and Conor is blamed for the crime and thrown into prison.
In prison, Conor passes the solitary months by scratching designs for flying machines into the walls. This has always been his dream, to win the race for flight.
After two years, Conor now sixteen, plans and executes a daring escape to the mainland. Initially he plans to return home, but realizes that this would put his entire family in danger, so instead he builds a glider to fly to the prison island and reclaim the diamonds he buried there from the prison mine. Eight bags of diamonds, means eight trips.
Conor's father is beginning to question Bonvilain's rule, and so the marshall decides to use his son to blackmail him. This is when he realizes that Conor has escaped. He also finds Conor's drawings and realizes that he is the mysterious Airman who has been flying around the prison island.
Bonvilain arrests Conor's whole family to trap him. To save them, Conor will have to build the flying machine that he has been dreaming of all these years.