Runaway - Alycia Linwood

Surprised by Adrian's sudden disappearance, Ria is determined to find him, even if that means she has to trust her brother and go to her father's party. However, soon she realizes that her father, as the president of the newly-founded Element Preservers Organization, plays a big role in the future of not only magic disease carriers, but also everyone with an element. As the secrets surrounding the magic disease and elements are revealed, Ria doesn't know who she can trust. But when an ex-lover turns into an enemy and a tragic accident changes everything, it's impossible to just run away. The second book in Element Preservers series. Element Preservers series reading order (complete): DANGEROUS (Book 1) RUNAWAY (Book 2) DIVIDED (Book 3) NO ONE (Book 3.5) RESTLESS (Book 4) INDESTRUCTIBLE (Book 5)