John Dalmas—pseudonym for John Robert Jones—wrote many books based on military and governmental themes throughout his career. He grew up in Minnesota and Michigan and resided in Spokane, Washington. He was a parachute infantryman in WWII and was discharged in 1946 without ever being put seriously in harm's way. He has worked as a longshoreman, merchant seaman, logger, construction worker, and smokejumper. He attended Michigan State University, majoring in forestry, but also took creative writing.
I'm sorry but I was not impressed at all. I thought the basic premise was interesting: an Earth colony was cut off from mother Earth. 700 years later they return to Earth to find out what happened and ..... Faults: I didn't think the characters were developed enough - at least for my taste. I never came to 'care' for any of them. To confuse matters, there were several sub plots going on which, to me, did nothing to add to the main story. We are given the barest of explanations as to why the 21st century world fell.
The book was presented as a 'stand alone' story -at lease from the blurb on the book cover. I did a little internet research and the author John Dalmas wrote several other books involving the character Yngling. Maybe there is a Book I and and Book 2 that would fill in the details. Then again, maybe not.