A Grimoire Changed My Fate

A Grimoire Changed My Fate is a Manga/Manhwa/Manhua in english language, Urban Fantasy series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Out of curiosity, I bought a grimoire from a dusty old bookstore. It was real. Solomon’s magic circles? Pentagrams? Demon summoning? No, where’s the Fireball and Chain Lightning?