Book one is already on Amazon, you can find it here: Kindle, Kindle Unlimited Without knowing how it happened, a young engineer died. He only realized that he was reborn in another world as Regulus Dawnshield and as a half-vampire. Soon enough, Regulus realized that he wasn’t born in an ordinary world. It was a massive world that had a system that everyone had access to. In this world, many species of beings existed, and being a hybrid between two of them, he was hated by most, more than a little. His father, a war hero who is distant since he is only the tenth son. He never talked about Regulus’ mother, too. His stepmothers and siblings made him realize for almost a decade how much they hated him. Still, Regulus spent those ten years waiting for his chance to be free. After an attack on his bedroom, he put his plans into action to explore this world and live as his own person, just as Regulus. However, for as long as he lives, he had to keep his origin hidden. Otherwise, there will be no end to the amount of people who will target his life... with that in mind, Regulus has to travel around the world, searching for power inside dungeons and labyrinths and unlocking classes at their depths. What to expect:  - An MC who likes to travel and explore dungeons and labyrinths to gain more classes. He also wants to combine his knowledge and the magic of that world to create all kinds of things from Earth and even beyond Earth’s technology.  - A world and a system that keeps expanding according to the exploration of the MC. The system can keep growing because the parameters can only increase when the people in this world unlock the classes that grant them the said parameter.  - Massive World Building.  - LitRPG elements. - 2000~2500 daily words.