El Baston Maldito #1

Strange things are happening in Mariefred. The town hides a secret library that the forces of good and evil fight to find. It is protected by two elderly siblings Estrid and Magnar. Viggo and Alrik are chosen to be their successors, but the old guardians do not believe they are prepared. When someone plants a cursed nithing pole in the garden where the boys live, all four must work together to break the curse before it's too late.