Not a winning combination
Like the other reviewer, Robert Dinger, I have really enjoyed Sam Llewellyn. I am also a great fan of Alistair MacLean's earlier works. If you expect a winning combination in THUNDERBOLT FROM NAVARONE, though, you will be sorely disappointed. The story was not captivating, the characters were not interesting. The cliff-hangers were paraded past like a sad Indiana Jones wanna-be. This is no successor for Alistair MacLean. Again, Sam Llewellyn's yacht racing mysteries are very enjoyable, especially if you're a Dick Francis fan, and I am looking forward to the next one of those.