Relics by Pip Vaughan-Hughes
Set in the 13th Century, the novel centres around the main character Brother Petroc, a novice monk from Balcester. Unwittingly he is duped into stealing a relic and is framed for a murder he doesn't commit, ending up on the run from the authorities and the real murderer.
Fleeing for his life he runs to his former mentor a Brother librarian who directs him to the the enigmatic Captain de Montalhac and his crew of pirates, who sail him away from immanent danger.
The novel then spins a tale of relic hunters, conspiracies and a Greek princess.......
Although this novel has had good reviews I was disappointed with it.
It started off well but once it got aboard ship and the princess was introduced it became a little too fanciful for me.