Cover Characteristics: Book Covers featuring Only the Backs of People

I can't do this! I can't choose just ten covers! Ok fine, I can. But there are A LOT of book covers with only the backs of people on them. Like, A LOT. And when I realized this, I told myself I wasn't going to freak out, I was just going to find some and choose ten without worrying whether I was missing other amazing ones or that I was choosing the "wrong" ones from the ones I had compiled. BUT...