Descent into Danger — Shannon Greenland

Co-owner of an Outfitters in New Mexico, Madeline Theros spends her days leading kayaking, hiking, and spelunking expeditions. It's the perfect life. Until one day a freak accident drops her down a shaft into an uncharted cave. The dream of a lifetime?

There's only one thing standing between Corey Grainge and the vice presidency of a land development company. All he has to do is strip-mine thousands of New Mexico acres, including the uncharted cave. Everything happens for a reason.

Locked in a battle over the land, Madeline and Corey realize they share a history that neither understands. Someone doesn't want them together and will execute any means to keep them apart.