I believe that the first cover, the cover of the book that we are reading, is the best of the four choices. It shows more emotion than the others, and in my opinion can be taken more metaphroically than the others as well. The socond cover, though it may be more dramatic in a sense, is taken too literally and shows Ben to be a monster. The third one is also too "dramatic" for my tastes, and also for what i believe the book's moods and motives are. The first one, also, is monochromatic, which promotes a mood of desolation and despair, more so than the other three which show emotions such as fear or pity.