This is an extremely atmospheric, slow burn character driven novel set in Elizabethan England. It really transports you to the world of alchemy and scientific exploration at this time. I loved the way the fictional characters met real characters from history like the alchemist John Dee.
Both Kit and Mariner were fascinating characters and I enjoyed watching their relationships develop with Elody and Lazarus as they go on their own journeys of self discovery. 
If you enjoy immersive historical fiction with strong character development I would recommend this book.