Bungo Stray Dogs Novel volume 4 was written by Kafka Asagiri and features illustrations by Sango Harukawa.

The Armed Detective Agency's latest case brings them to a strange island off the coast of Yokohama called "Standard Island," but what awaits them turns out to be far more complicated than expected: a bomb, time travel, a mysterious skill user named H.G. Wells... Will this incident spell the end of Yokohama itself?!