Spiral: The Bonds of Reasoning is complete with 15 volumes.
Spiral: The Bonds of Reasoning is a fifteen-volume mystery manga series written by Kyou Shirodaira and illustrated by Eita Mizuno. It was published by Enix and then Square Enix in Monthly Shōnen Gangan from February 2000 to October 2005 and collected in 15 bound volumes. The series focuses …