I was 14 when I picked up a book from my school library which contained excerpts and short stories related to space travel and such.
There was this particular story, the first one actually, where a guy finds a white helmet sort of thing which he pulls over his head and it transforms to fit his face and becomes invisible.
The helmet is an alien artifact and is placed on earth so that a native finds it. It collects all kinds of data while the user is wearing it, and gives the wearer super strength and super intelligence.
In the end the guy gets ready to leave earth so that he can transport the data of the helmet to its source community.