A Tall and Small Collection

Soren, a Borrower, just migrated with his two half brothers and his step-father into a new apartment complex. Though his step-father leads the family, it is his blunder which has forced the family to migrate on the cusp of winter. Soren must fight daily to help his family survive; however, he knows nothing about the occupants of this new building. Who lives here? What innate dangers do these humans possess? And what would they do if Soren or his family were discovered?