The Dark Crusader By Alistair Maclean

A new type of fuel was invented. England started making a unique missile based on it, but one by one all the scientists working on it started disappearing with their wives. Somewhere the secret of this project was leaking. The Secret Agency was worried about it. It was a huge project. The enemies wanted to conquer the world, they wanted the ownership of the missile, and now when everything was almost set, there was just one flaw, they were not able to fuse the missile. Missiles, ships, spying, future nuclear wars, and the lust to rule the world, all has come together giving rise to suspense, action and happenings, yet not devoid of a love story.