The best piece of official art is still this photo of Accelerator and Last Order from Volume 22.

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(C77) [Asanoya (Kittsu)] Kuroko Dai Monzetsu Jigoku Hen (Toaru Kagaku no Railgun) http://t.co/5dzdngai

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(C81) [Majimadou (Matou)] Oneesama Kanzen Kouryaku Photo Album (Toaru Kagaku no Railgun) http://t.co/G627GtU3

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