The Skynappers — John Brunner

When Ivan Wright stepped out of his mountain cabin, rifle in hand, to investigate the sound of a strange helicopter, he stepped right into the middle of a galactic crisis.

For the crew of that odd aircraft were not men such as he'd ever seen before - and when he tried to oppose them, he found himself hurled uncontrollably into oblivion.

He awoke to find himself considered as a kidnapped barbarian from a backward planet in a galaxy of advanced civilizations - yet one who somehow held in his own hands the key to all their futures!