Volume 1 is the first volume of the Mahou Tsukai no Yome Shihen.75: Inazuma Jack to Yousei Jiken series. The series is published in Japanese by Mag Garden and Seven Seas Entertainment in English.
Publisher's Summary[]
Faerie-born Jack Flash and her human-born brother, Larry, run a detective agency in New York City specializing in crimes committed in the hazy boundary between the human and faerie realms. They never expected to receive a letter from an ancient magus of the Old World, but Echos, caretaker of dragons, has a task for them. An all-new The Ancient Magus’ Bride spin-off series![1]