@GoodMornin2u2 'I'm not the evil g**'s lackey' is basically this. Mc is an eldritch g** who wanted to develop a human consciousness. So he sealed his true body and put his consciousness into a human embryo, he also created an offshoot of his main body to protect himself as a human. He is born on earth and about 20 yrs later gets transported (by his offshoot) to the world where he left his main body and becomes a bookstore owner who sells books filled with forbidden knowledge(unlike everybody else he sees the books as normal books from earth also the books are knowledge he gathered as an eldritch g**). Novel is complete but in the manhwa he still has no idea who he is.