This book came out in 1981. I was thirteen then and I read the whole thing staight through. Over the past nineteen years I've re-read it more than once and every time I've enjoyed it along with the two sequels, Single Combat and Wild Country. There are elements in the series that are now dated,but that is beside the point. The books are detailed, intelligent, suspenseful, and have some very well done action sequences. They accomplish what good science fiction should do, they take the reader to another reality and make it believable. My only complaint is that there has never been a fourth installment in the series. At the end of Wild Country ( released 1985) there are hints of what is coming in the next installment, but twenty-six years later there is still no fourth book. Why? Was it because by 1985 Mr. Ing concluded that the real world was going in a very different direction and his series (set in the late 90's and early 21st century) was in danger of being unbelievable?True it is no longer applicable to the world of today but so what? Let's just say it takes place in an alternate reality and get on with it. Well regardless pick up these book if you get the chance. In my opinion they are three of Mr. Ing's best works. Single Combat and Wild Country