A Certain Magical Index, Vol. 23 (manga)  (English, Paperback, Kogino Chuya)

Violence rages through the streets of Avignon as magic and science clash! Academy City forces are bombarding the city, and Touma has to find the weakness in Terra of the Left's spell, Light's Execution, before it's too late. With all eyes on France, there's no one watching as the shadow organizations of Academy City rise up, thrusting Accelerator and the rest of Group into a deadly battle royal!