42 books • 3 series
Book #1: Seraph Of The End 1
Book #2: Seraph Of The End 2
Book #3: Seraph Of The End 3
Book #4: Seraph Of The End 4
Book #1: Seraph of the End, Vol. 1
Book #2: Seraph of the End, Vol. 2
Book #3: Seraph of the End, Vol. 3
Book #4: Seraph of the End, Vol. 4
Book #5: Seraph of the End, Vol. 5
Book #4: Seraph Of The End: Guren Ichinose: Catastrophe At Sixteen (manga) 4
Book #5: Seraph Of The End: Guren Ichinose: Catastrophe At Sixteen (manga) 5