Children's book: Mine, my dear Mine

Bosse, is a 9-year-old boy who lives with his adoptive parents, for whom his presence is uncomfortable. They don't seem to like the idea of adopting him at all, everything he does bothers them and that lack of love will start an affair. An adventure in which Bosse will become Mine and where he will arrive in the "Outer Land" to fight against the cruel and ruthless knight Kato. The journey has begun! The delicate pencil of Luz Marina Baltasar exquisitely illustrates this extraordinary story.