Back in March I did the first part of a Tom Adams gallery looking at some of his covers for Fontana's Agatha Christie novels. I've finally had a chance to clean up a second selection. Adams' work was the subject of Agatha Christie: Cover Story, which appeared from Paper Tiger back in 1981 and is long out of print, but a great book with some fascinating commentary by Adams and Julian Symons if you can find a copy second hand.
You can find a little more about Adams in a piece that I wrote some years ago for Bear Alley. He also has his own website if you want to learn more about his work.