Never Let Me Leave (The Melissa Allen Trilogy Book 2)

What would you do if you found yourself locked in an underground lab with a murderous alien hunting you? Melissa Allen and her new friends know exactly how it feels. With no help from the outside and time running out, it's up to Melissa to keep herself and the other teens safe. How can she do that when she's not sure who she can trust?

Someone in the lab helped that alien escape. Someone human.