Secret City

One day, Charlie Wilson finds a 200 year old diary, claiming there is treasure buried under the streets of Edinburgh.
Naturally, he decides to go looking for it, aided by a mysterious young juggler named Lilly.
But there's something deadly waiting below the ground.
In order to survive it, Charlie must become an explorer, detective, magician, acrobat and grave robber.
Then, finally, a killer.
Secret City is the first book of the Galhadrian Trilogy - a completely new variation of the Arthur and Nimue legend