26 books • 1 series
Book #1: Sleepy Princess in the Demon Castle, Vol. 1
Book #2: Sleepy Princess in the Demon Castle, Vol. 2
Book #3: Sleepy Princess in the Demon Castle, Vol. 3
Book #4: Sleepy Princess in the Demon Castle, Vol. 4
Book #5: Sleepy Princess in the Demon Castle, Vol. 5