Seventeen-year-old Harley Martin has been obsessed with Paris for years. Between her passion for studying architecture and wanting to spend time with her cousin, Gretchen, there's nowhere on Earth that she'd rather go. So when Harley's parents feel guilty enough about their constant fighting to offer to send Harley to visit her cousin, Gretchen, she doesn't hesitate.But Gretchen and Harley have both changed in the years they’ve been apart. In an effort to rekindle their friendship, Harley agrees to Gretchen’s suggested activity, even though it’s outside her comfort zone: a tour with Gretchen and her friends through the off-limits section of the Paris Catacombs. Miles and miles of tunnels deep under the city, filled with the remains of more than six million people.When a cave-in kills their guide and leaves the group injured, terrified, and lost with limited supplies, they must search for a way out from the endless maze beneath the city of light. But surrounded by shadows, it's hard to tell friends from enemies. Harley doesn't know if she can trust anyone, including her own cousin. If they ever want to get back to the surface, they'll have to fight for everything they hold dear—for their sanity, their humanity, their very lives—in a place that only embraces death. J.R. JOHANSSON is the author of the Night Walkers Series (INSOMNIA, PARANOIA and MANIA) as well as standalone novels, CUT ME FREE and THE ROW. Her books have been published in over a dozen languages and more than twenty countries worldwide. She is the creator and host of the Riveting Reads podcast and the AuthorGamerGirl channel on Twitch. She has a B.S. degree in public relations and a background in marketing. She credits her abnormal psychology minor with inspiring many of her characters. She lives in a valley where the sun shines 300+ days per year with her hot tub named Valentino. Visit her online at jrjohansson.com.