Of Alchemists and Arsonists: A Steampunk Romance (The Whitfield Files #3)
Katherine McIntyre

Isobel Griffiths, an arsonist with a knack for setting blazes unseen, has wanted her freedom ever since her parents sold her to notorious gang leader, Jack Blair. Drawn into Isobel’s whirlwind, Nate is soon smitten…as is she.
Belle's clever, but to escape the clutches Blair’s clutches, she’ll need more than wits—she’ll need Nate’s alchemy. If their plan doesn’t succeed, it could spiral into a gang feud large enough to tear all of Islington apart.