The September light novel sales rankings were announced by Shosen Book Tower, a popular bookstore in Akihabara, Tokyo, and in first place was the second volume of "The Irregular at Magic High School: Darkness Flashes in the Curtain of Night" (Dengeki Bunko). The spin-off of "The Irregular at Magic High School" depicts the Kuroba siblings standing up against an organization that is targeting Shiba Tatsuya.
In second place was the fifth volume of "Iden: Tanami no Umi - Urin, Soaring Through the Warring States" (TO Books), and in third place was the tenth volume of "My Neighbor's Angel Turned Me Into a Useless Person Without Me Noticing" (GA Bunko), which was also made into a TV anime.
Rankings
1st place: The Irregular at Magic High School: Darkness Flashes in the Curtain of Night 2
2nd place: A Different Legend: The Sea of Amanoumi ~Huurin, Flying Through the Warring States~ 5
3rd place: The Angel Next Door Turned Me Into a Useless Person Without Me Noticing 10
4th place: The Story of the Tiamoon Empire 16
5th place: I Woke Up with the Strongest Equipment and a Spaceship, so I Want to Live Freely as a Mercenary, Aiming for a House of My Own 13
6th place: The Ryuo's Work is Never Done!: Off-Ban 2
7th place: A Certain Magical Index: New Testament 11
8th place: Goblin Slayer: Year One 4
9th place: Strange Reincarnation 27
10th place: I Was Reincarnated as a Sword 18