Charles Young 
The Three-Headed Dragon and the Golden Keys [EPUB ebook] 

‘The Three-Headed Dragon and the Golden Keys is an adventure story about
four young students who fi nd adventure in todays world and in medieval times.
Gordon, Alita, Carlos, and Louis have formed a little club they call the Daredevil
Detective Agency. These fourth and fi fth graders will try to solve the problems
of a mine shaft collapse, an unruly wizard, and an enemy Golden Knight. But
their biggest dilemma is a fi re-breathing, three-headed dragon that would like
to possess the golden keys to the kingdom. You will also meet an unusual
collection of people who help these young detectives survive their quest while
they are in the medieval world.’