What kind of title is this?: Manga.
How many volumes are there?: 26 volumes are listed.
How many chapters are there?: 200 chapters are listed.
Where can I read it?: Reading links are listed for Official Site, J-Novel Club, Yen Press. Check availability in your region.

Synopsis

About Black Summoner

Waking up in a strange new place with no memory of his past life, Kelvin learns that he's bartered away those very memories in exchange for powerful new abilities during his recent transmigration. Heading out into a whole new world as a Summoner — with his first Follower being the very goddess who brought him over! — Kelvin begins his new life as an adventurer, and it isn't long before he discovers his hidden disposition as a battle junkie. From the Black Knight of the Ancient Castle of Evil Spirits to the demon within the Hidden Cave of the Sage, he revels in the fight against one formidable foe after another. Join this OP adventurer in an exhilarating and epic saga as he and his allies carve their way into the annals of history! (Source: J-Novels)

Action Adventure Fantasy