Treasure Me by Robyn DeHart

There’s nothing quite so mysterious as Loch Ness…

Graeme Langford, Duke of Rothmore, has always been torn between his beloved Scottish homeland and his duty to the English crown. But his is an adventurer’s soul and nothing keeps him from his dream: finding a long-lost stone hidden near Loch Ness.
Bookish Vanessa Pembrooke heads to the Highlands looking for traces of the legendary beast—not a husband. Yet when fate binds her to Graeme, it’s not all bad: he’s the first man ever to share her hunger for adventure. As their passion grows, so too does certain danger, and they’ll soon risk everything to keep the jewel out of a murder’s hands. But can they do so without losing the greatest treasure of all . . . their love?