Isla Marren can forge a masterpiece so perfectly that experts weep. She does it in secret, in the box room of her family’s Peckham flat, to pay off a debt her dead father left to a collector nobody has ever seen.Then she walks into a masked auction, in disguise, and meets the most dangerous man in London.Cassian Hale owns the room. He breaks a man’s wrist for Isla on the first day they meet without knowing who she really is, and he looks at Isla as if she is the only person in it. She also tells him no to a request he made that day. Nobody has told him no in years. Hours later, her mother announces she is marrying his father.Now he is her stepbrother. He knows what her hands can do. And he has a deal for her: help him destroy the man who owns her debt, or he hands her to the police.She should hate him. Every man who ever offered her help sent an invoice, and Cassian Hale is no different. But she has fourteen days to paint a lie worth millions, a little brother who sleeps with a night-light, and a stepbrother who will not leave her alone.Under one roof, with a forbidden fire neither of them can put out, they hunt a ghost through London’s art world. But the collector they are chasing knows more about the Hale family than the Hales do, and someone has been watching Isla since the day her father died.Some forgeries are only lies until they are loved. Some loves are the most dangerous forgery of all.