The Dragon Detective Agency is a series of children's books written by Gareth P. Jones

Gareth P. Jones

Gareth P. Jones is a British children's writer, and author of the Dragon Detective Agency series of books. He is most famous for his book The Thornthwaite Inheritance. All six of his books are detective stories for children...

 and published by Bloomsbury Publishing. The first book, called The Case of the Missing Cats, was published in 2006. It involves a girl called Holly Bigsby who has lost her cat Willow. She calls the Dragon Detective agency but she doesn't know that there's a dragon on the other end called Dirk Dilly. Dirk thinks it's an investigation that he doesn't need to solve but he finds out there's a sinister plot behind this including something mysterious in a river.