The Sign of Four by J.A.Tower

In a world where four magic races coexist in isolation, the Colonnier and museum clerk, Connor Newgate, returns to his home, Colonnia, with a new discovery. However, this forgotten relic puts him and other individuals in the middle of a thousand year conspiracy that involve the entire continent. With Alma the Ashvani, Levi the Amarath and Amigo the Jollion, will have to join forces and discover the truth hidden in The Sign of Four: The Forgotten Museum.