I'm constantly searching for more information on the Modesty Blaise cover artists. There's plenty of information about the comic strip artists, but little to be found on the artists of the novel covers and many of the international strip collections. One of my favourite artists is Mike Codd, who illustrated many of the Souvenir Press editions. I found some more of his cover art on Steve Holland's Bear Alley blog.
The entire blog is a joy for book and comic collectors alike - I highly recommend giving it a read.