The Design Of The Novel's Cover

On the front of the book I'm reading The Medusa Project it has four teenage students on the front in the back ground they is a symbol of the Medusa Project, there is white and black splatters of blood or liquid on the cover as well which tell that the teenagers are up to no good. The cover tell me that the book is a bit of an mystery, and that the teenage boy how is in front of the two girls and the one boy tell me that he is the head charater. I did not realy chose this book but the title The Medusa Project The Set Up just seems quite interesting. A good front cover of a book needs a good title, colours that stand out, a slogan and some pics-charaters on the front. A bad cover of an novel will have not much of a veriaty of colours on the front, no slogan, no pics-charaters on the front and the title does not stand out proparly. I haven't realy come across a book that has a good front cover and did not turn out like I did not expected it to. I had a look at Tom's book Bunker 10 it looks like it is a bit of a last stand type of theme it seems to interest me abit. The Book Bunker 10 was one of my choces.