88 books • 7 series
Book #20: A Certain Magical Index, Vol. 20 (light novel)
Book #23: A Certain Magical Index, Vol. 23
Book #25: A Certain Magical Index, Vol. 25 (manga)
Book #26: A Certain Magical Index, Vol. 26
Book #29: A Certain Magical Index, Vol. 29 (Manga)
Book #2: A Certain Magical Index NT, Vol. 2 (light novel)
Book #11: A Certain Scientific Accelerator Vol. 11
Book #12: A Certain Scientific Accelerator Vol. 12
Book #5: A Certain Scientific Railgun Vol. 5
Book #6: A Certain Scientific Railgun Vol. 6
Book #7: A Certain Scientific Railgun Vol. 7
Book #15: A Certain Scientific Railgun Vol. 15
Book #16: A Certain Scientific Railgun Vol. 16
Book #4: A Certain Scientific Railgun: Astral Buddy Vol. 4