I think what you find with his books these days is that he lends his name to the cover in large print, but the key writer is actually someone else.
I always enjoy books by Ken Follet, Key to Rebecca, Eye of the Needle, Night Over Water, etc. There was a great one out years ago that I believe was called Imperial 109. About a flying boat going around the world. Lots of intrigue. Would love to find another copy.