From the New York Times bestselling author of With This Ring comes a Wicked Worthington novel of love that defies reason... Intelligent and driven, Orion Worthington aspired to be like his mentor, the acclaimed scientist Sir Geoffrey Blayne. Logically, Sir Geoffrey's daughter would be Orion's perfect match. So why can't he keep his mind off the unruly girl who works in Sir Geoffrey's lab? Orphaned fire-cracker Francesca Penrose hopes that London is modern enough to accept her brilliant mind despite her womanhood. But she can't help noticing Orion's mind...or his body. So they decide to run an experiment- if they give in to their passions, their attraction will simply fizzle out, with no impact on their hearts...right?