There’s nothing like a claustrophobic thriller to get your blood pumping. In the new hair-raiser Underwater, Kristen Stewart plays Norah, a mechanical engineer who finds herself trapped at the bottom of the ocean. As she and her crewmates fight to make it to safety against elements natural and monstrous, Norah must use her wits to survive the Lovecraftian nightmare. Looking to get some more of those up close, terrifying chills of being trapped? Then these four reads will get your heart pounding faster than a speedboat, though you might never want to travel by sea again.