Book covers research

I recently read an article on the digital arts magazine about book cover design it has been written by  a number of well known and respected illustrators. This article has really helped me when designing for the book covers. I really liked what Owen Davey said about using bold shape and colour- i feel that this is something that I can incorporate into my work quite easily. I really like what he said about making the spine exciting too. It gives me ideas to incorporate symbols or motifs on the spine.