Darkness Breaks — Jessica Sorensen

Kayla made her choice and now she has to live with it. She stays with the Day Takers, hiding in the city, staking vampires. But fighting vampires as a human is difficult. Sylas constantly pressures Kayla to choose the life of a Day Taker. But until Kayla knows what Monarch is planning, she can't make her choice. Plus there's Aiden. No matter how hard she tries, she can't stop thinking about him. As Kayla's memories resurface, the pieces of her history unfold. She learns of Cell 7, a place that Kayla believes holds the answers to the creation of the virus. But getting to Cell 7 is a dangerous mission. And with Kayla's strength weakening, it's one mission she might not make it through alive.