It is 'Mortlock' by Jon Mayhew. If you like adventure or fantasy books then you are sure to enjoy this book.
From the blurb-
"Josie is a knife thrower in a magician's stage act. Alfie is an undertaker's assistant.
They are both orphans and have never met, but they are about to be given a clue to the secret of their shared past.
A past which has come to seek them out.
And while they flee for their lives, they must unravel the burning mysteries surrounding the legacy that threatens to consume them."
Don't be put off by the historical setting because once you get into the story I am sure that you will discover that it is a real page-turner.
