I read this many years ago.
It involved a man who learned that he was among a group of slightly evolved 'super humans.' He met a girl of similar background.
They were helped by a used car (flyer?) salesman maned Beetle Kelly or something like that.
In the end they saved the world while on the Moon and died in the process.
I believe at that point they were known as Mr & mrs Joe Green
They were briefly referenced in one of the author's later books.
???
It involved a man who learned that he was among a group of slightly evolved 'super humans.' He met a girl of similar background.
They were helped by a used car (flyer?) salesman maned Beetle Kelly or something like that.
In the end they saved the world while on the Moon and died in the process.
I believe at that point they were known as Mr & mrs Joe Green
They were briefly referenced in one of the author's later books.
???