A.E. van Vogt: The Universe Maker
Parallel realities, time travel, alien-human wars, alter egos.
Electronic cigarettes (vaporizers) already mentioned in 1953:
That cigarette,” he said. “You didn’t light it.”
“Cigarette?” She looked puzzled; then she seemed to understand. She reached once more into her purse and came out with a second cigarette similar to the one she was smoking. She held it out to him.
“It works automatically,” she said, “every time you draw on it. Very simple but I’d forgotten they won’t be available for a hundred years yet.
You can also check other interesting quotes from books I read.