The Shadow in the North (Sally Lockhart Mysteries, Bk. 2)

The year is 1878, and the spirited Sally Lockhart, once again defying Victorian sensibilities, has gone into business for herself. When one of her clients loses a large sum of money in the unexpected collapse of a British shipping firm, Sally sets out to investigate. But as she delves deeper into the identity of the wealthy and elusive industrialist who owns the doomed company, she uncovers a plot so diabolical that it could eventually subvert the entire civilized world—and if Sally's enemies have their way, she won't live long enough to see it happen.