
The Academy City, where "psychic power" is recognized as a "general science." Behind its peaceful facade lies a "shadow" organization undertaking missions too sensitive to be made public. (Source: Dengeki Bunko, translated)
Toaru Anbu no ITEM is a Japanese novel of 417,760 characters, with 16,303 unique words and 2,156 different kanji. Its difficulty rating on Jiten is hard, 3.5 out of 5. The full vocabulary list ranks all 16,303 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.