R. M. Ballantyne 
Pirate City 

A merchant and his two sons leave Sicily on a voyage, but they are soon interrupted by a pirate from Algiers. When he takes them captive, they must fight not only for their own survival but also to forget the atrocities that they witness. An exciting historical tale of brutality, survival, and humanity, this is perfect for fans of Robert Louis Stevenson’s ‘Treasure Island’. –