Breathe — Suzanne Cox

17 year old science prodigy, Laney Brookes, is looking for two things: a cure for the flu virus that's ravaging the world and the truth about what happened to her father. Using clues from her father's secret journals, she and her two friends Kate and Carter follow what she thinks is the path to the answers.

It's a path that lands them in the lost world of Atlantis, a world struggling to survive. Laney finds more than just answers in Atlantis. She finds love. To get her friends and herself home, Laney will have to travel into enemy territory, led by Andrew a young Atlantean determined to return his people to power. In the process she'll even unravel the mystery of her missing father. But first, she'll have to figure out who the real enemy is.