Good and Bad book Covers

I believe this is a bad book cover because it seems to be just thrown together according to the title and there is no symmetry or unity or even balance.

This is a bad book cover in my opinion because there are to many different things going on that don't seem to be related to each other and there is no balance or unity.

This is great book cover because the letters are all aligned properly and the colors add a sense of unity.

This is a good book cover because it has balance and symmetry. It is simple but gets the point across and it is not too much going on.