The Design of the Novel's Cover

When I saw the cover of the most recent novel I am reading I was immediately drawn to it, it features a huge Grizzly bear roaring with its mouth wide open and I boy about 14 years old standing underneath it I picked it up and read the words "Grizzly Trap". I think a good front cover needs to feature something exciting like a picture or even better a 3D picture. A bad front cover would probably feature a bland color with a boring font (that doesn't mean the book will be bad though). I have been won over by a cover once the book was called "World Shaker" it looked like an interesting cover but the book did not live up to its expectations and I was pretty disappointed but I continued reading it anyway because I try to always finish a book if I start to read it. The book I saw was titled "Trash" and the thing that really stood out was a huge pile of trash in the background. This is quite an effective technique in attracting a readers attention as it clearly worked on me.