About the book: year / My grandfather was the keeper of a unique ring. This artifact contained knowledge that could bring chaos to the world of the magical Middle Ages if it fell into the wrong hands. But one day mercenaries came, killed my grandfather and kidnapped my relatives. And I still have at my disposal the scientific knowledge of another world called Earth, which is not so easy to use. But to save my family, I am ready to go to great lengths. For example, combine earthly science and your own magic.