Coles Manning Coles 
Alias Uncle Hugo [EPUB ebook] 

A Hambledon espionage story set in Central Europe behind the Iron Curtain. A 13-year-old princeling has been sent into Russia to a school for leadership and Hambledon is assigned to his rescue and spiriting him out of Russian hands to safety in England. Plenty of violence, quick thinking, fast talking and changes of identity before a plane is used to make a speedy getaway!