I got reincarnated with a skill book Skill Book

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System, Skills, Class, Items, Dragons, Demons, Magic, The world in which Dave is transmigrated was completely like the fantasy novels and manga he had read.

Dave and Seven other people were summoned into the world through a hero-summoning ritual. For Dave, the situation wasn't a dream come true as he wasn't even the hero they were supposed to summon. The Grand Priest who summoned him announced that he was Classless. A failure, who was offered to serve as a low-class servant or the lowest-ranking soldier in the army.

Upon an argument with his summoner, Dave decides to leave the palace and live in an unknown world on his own. Later he founds that instead of receiving any class or cheat skills he had received a cheat item called Skill Book that allows him to learn any skill he wants.

He decides to make himself the strongest in the world as he starts to understand how this world works. However, as he continues the journey he found out that he had memories of another life in this same world.

What was the truth behind his previous life in this world? Will he become the strongest in the world using a cheat item?

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