Weeks after the first Roosevelt treasure cache was discovered, the Grand Canyon has been overrun by reckless treasure hunters. For Dr. Meg Lewis, the chaos hits close to home. She came to the park to stitch up cuts and wrap sprains--not dive back into a world of live-or-die medical drama, a world that cost her everything. . . .

Ranger Director and widower Noah Wilde has spent years keeping everyone at arm's length, terrified that loving again will only lead to grief. He's not about to let any more deaths happen on his watch. When another group becomes trapped in the dangerous Domes cave system, Noah assembles a rescue team with Meg as medical officer.

But they find someone has been systematically sabotaging expeditions. As floodwaters rise and the cave ceiling collapses, Meg must figure out how to save lives, and Noah must find a way out . . . or watch someone else he loves die.

In Too Deep is a pulse-pounding romantic suspense novel with heart-stopping cave rescues, life-or-death medical drama, and electric tension between two wounded souls who must trust each other to survive.