16 books • 4 series
Book #1: Arthropoda
Book #2: Demon's Game
Book #3: Demon's Dance
Book #4: Demon's Test
Book #1: Demon's Wish
Book #1: Casto Volume 1
Book #2: Love and the Stubborn
Book #3: Ummana Volume 3
Book #4: Braving the Storm Volume 4
Book #5: The Rules of War