The Bookman (Bookman Histories, 1) [Tidhar, Lavie]

When his beloved is killed in a terrorist atrocity committed by the sinister Bookman, young poet Orphan becomes enmeshed in a web of secrets and lies. His quest to uncover the truth takes him from the hidden catacombs of a London on the brink of revolution, through pirate-infested seas, to the mysterious island that may hold the secret to the origin, not only of the shadowy Bookman, but of Orphan himself...