The Stars My Destination by Alfred Bester

Any copy I've seen looks like a romance novel, featuring two characters staring into each other's eyes.

In reality it's a Science Fiction book about human evolution and the government trying to weaponize it.

EDIT: My memory was a bit off. They aren't staring into each other's eyes...the man is behind the woman in a spooning kind of pose, and they both have their eyes closed as if they're about to start making out. It was worse than I remembered.

The book is like a far out, sci-fi action movie with depth and meaning and is great.