40 books • 5 series
Book #1: Airboy Archives Volume 1
Book #3: Airboy Archives Volume 3
Book #4: Airboy Archives Volume 4
Book #5: Airboy Archives Volume 5
Book #1: The Forgotten Horrors Omnibus
Book #2: Forgotten Horrors 2
Book #3: Forgotten Horrors 3
Book #3: Forgotten Horrors Vol. 3
Book #4: Forgotten Horrors 4
Book #1: Leo Kragg