9 books • 3 series
Book #1: The World's Fastest Level Up (Light Novel) Vol. 1
Book #2: The World's Fastest Level Up (Light Novel) Vol. 2
Book #3: The World's Fastest Level Up (Light Novel) Vol. 3
Book #4: The World's Fastest Level Up (Light Novel) Vol. 4
Book #1: The World's Fastest Level Up (Manga) Vol. 1
Book #2: The World's Fastest Level Up (Manga) Vol. 2
Book #3: The World's Fastest Level Up (Manga) Vol. 3
Book #4: The World's Fastest Level Up (Manga) Vol. 4
Book #5: The World's Fastest Level Up (Manga) Vol. 5
