Maximum Ride, Vol. 6 by NaRae Lee

The time has come for Max and her winged "Flock" to face their ultimate enemy and discover their original purpose: to defeat the takeover of "Re-evolution," a sinister experiment to re-engineer a select population into a scientifically superior master race...and to terminate the rest. Max, Fang, Iggy, Nudge, Gasman, and Angel have always worked together to defeat the forces working against them-but can they save the world when they are torn apart, living in hiding and captivity, halfway across the globe from one another?