Rosalyn and the Secret of the Bluebloods

My blood will determine my life.
At age sixteen, every teenager in New York City is required to get their blood drawn on the annual occasion - Blood Day. Depending on your blood type, you're assigned a career to carry out for the rest of your life. Whatever career you're given, it's an honor to be chosen.
My sister never got that privilege. On her Blood Day, she vanished without a trace - like she was never there at all. Ever since then, I haven't gone an hour without thinking about her. Wondering where she went, and why she hasn't come back.

Rosalyn Steele has been recruited for a prestigious government position - a CWS, or a Clean Water Scientist. The year is 2200, and a post-apocalyptic New York has risen from the ashes. With weather patterns ruined for years to come, the survivors are dying of dehydration. Her job? Create a serum that will purify any water in time to save the human race.
Along the way, she'll befriend a mysterious spy and a handsome fencer, make an unforeseen sacrifice, and bribe an eccentric alchemist. However, unrest is brewing just beneath the streets, and what Rosalyn learns will twist everything she thought she knew ...forever.