Here is my next sample sci-fi book cover, it is called, Lost World:
Having just watched the most recent Jurassic Park movie (Jurassic World) I thought it would be cool to illustrate a couple of dinosaurs to wash the bad taste of the movie out of my mouth. The idea with this cover was to focus on the female character being caught of guard by the two massive dinosaurs - like you do when they ninja up on you from the jungle. Making sure to draw the eye of the 'reader' towards the top third of the image (where the title or author's name would appear). I think it works.
Artwork ©Simon Breeze 2016