The story starts with the narrator, who is never named in the book but always referred to as "Hunt Master," briefing his party of 15 foot humanoid aliens from many planets as they prepare to start their hunting trip on a dangerous planet - Earth.
After the initial foray by the hunting party against the planet's outgunned human defenders, the narrator, who appears from the start to have a more complex agenda than his clients, describes the perspective of the book's principal human character, Walsh, who was "one of the first to see the truth".
"These things could take the planet apart" says Walsh. "Wy don't they?" ... "I'll tell you why. Our Glorious and unique planet has been turned into a game preserve and we are the prey."
As the story proceeds Walsh and his friends find that earth has both allies and enemies who are far more advanced and dangerous than the alien federation which has turned our planet into a game preserve - and few things are as they seem.
I used to love Philip E High's science fiction stories at the time they were written, mostly around the 1970's. Many of them have dated - the science was not always brilliant even by the standards of 1970, and many of the stories present humans as uniquely talented in a way which jars somewhat now.
However, High's best stories have not dated and are still fun to read, and "Come, Hunt an Earthman" was definately one of the best.