A Certain Magical Index



is a Japanese light novel series written by Kazuma Kamachi and illustrated by Kiyotaka Haimura, which has been published by ASCII Media Works under their Dengeki Bunkoimprint since April 2004. Yen Press have licensed the novels in North America.

Plot
Academy City, a technologically advanced independent city-state located in the west of Tokyo known for its educational and research institutions, and populated with those of supernatural abilities. A young high school student named Tōma Kamijō has an unusual ability until he encounters an English nun named Index. His ability and relationship with Index prove dangerous to other sorcerers and Espers who want to discover the secrets behind him and Index, as well as the city.