Stranger from space colony ark (Shadow the hedgehog fanfiction, book 4)

Sophie is finally back home and everything's back to normal, or is it? will Sophie discover something more in her not so ordinary life on Mobius? or will a new rival appear? Is he here for Sophie or the hero, sonic the hedgehog? or is he after a certain red and black one that we all know? find out in this exciting new book.. : )