Robert C. Yeager

Thrown together after a brutal murder at a famous London department store, Mackenzie Farrar and Hector Molina have just seven days to solve the crime. Painfully self-isolated, each hides an uncomfortable truth from their past. Molina, an international jewel thief who grew up in Brazil's squalid favelas, masquerades as a security consultant. As the story opens, he is living an active lie: to save his brother's life, Molina must steal the very jewel he's been hired by Mackenzie's store to protect.
Mackenzie, meanwhile, is tortured by a failed love affair, an affair that left her with a broken heart and a quirky gift, the rare ability to mirror-write. At stake are two rare gems - one which has been famously missing for centuries - the store itself and their very lives. Only by learning to trust one another can Mackenzie and Hector hope to succeed - and survive.