Also known as "In/Spectre," or "Invented Inference," is a 2011 Japanese novel written by Kyo Shirodaira with illustrations by Hiro Kyohara and since volume 2, by Chasiba Katase. A manga adaptation with art by Chasiba Katase has been serialized since April 2015. An anime television series adaptation by Brain's Base premiered on January 11, 2020.
