I found this book to be an interesting mix of eras... in many ways it resembles the 'travelogue' style that Burroughs uses, with the author claiming to have 'found' the manuscript of the adventure, yet there's alot of elements of the later sci fi of the 50s and 60s.
The plot is pretty basic, and alien crash lands, and the two men that discover him decide to help him get home. One ends up going home with him to give us a glimpse of his planet.
There's a fair amount at the attempt of scientific explanations of how a star ship might work, but many things that would be essential and obvious to today's readers are ignored... food, water, gravity, the effects on the body of not moving for like 3 years, to name a few of the most blatant.
I'm not sure if the author intended the alien civilization to be a utopia or a warning.. it's basically socialist, with a rigid caste structure and overtones of government mind control. Not my idea of a great place, but the cover calls it Utopia. Of course, this was printed not only 30 years after appearing in the magazines, but after the author's death, so that doesn't mean much.
The main downside of the book was it seriously peters out at the end, as if the author was bored with it. With the excuse that 'the manuscript got more messy'.. the last couple chapters skip around alot and the ending is both vague and disappointing.
Worth reading if you're a old time sci-fi fan though as an interesting transition between the turn of the century writers and the 60s.