The Blood Thief of Whitten Hall

In a world of science, magic is an abomination, but not the vile creation Royal Inquisitor Simon Whitlock once believed it to be. Accompanied by his apothecary companion, Luthor Strong, and Matilda Hawke, a werewolf, they return to the capital of Callifax, eager to convalesce after their last adventure.
Their peace is short-lived, however, as they are quickly sent on another mission. It seems the iron mines of Whitten Hall have ceased their production, no longer sending its ore to the crown. The Ministry of Trade has sent inquiries, but its representatives have all fled from the train ride to the distal outpost. It seems a vampire stalks the trains in and out of Whitten Hall, a vampire that will reveal the secret of the iron mine and the darkness that resides within.
The Blood Thief of Whitten Hall is the second book in the Magic & Machinery Series by Jon Messenger.