Patrick Ness 
Ask and the Answer [EPUB ebook] 

Fleeing before a relentless army, Todd has carried a desperately wounded Viola right into the hands of their worst enemy, Mayor Prentiss. Immediately separated from Viola and imprisoned, Todd is forced to learn the ways of the Mayor’s new order. But what secrets are hiding just outside of town? And where is Viola? Is she even still alive? And who are the mysterious Answer? And then, one day, the bombs begin to explode… The Ask and the Answer is a tense, shocking and deeply moving novel of resistance under the most extreme pressure.