Being an avid reader of Sci-Fi I found this novel very interesting. Although the author did start out rather slow, I found that once I got into reading it, I could not put the book down. I really enjoyed the way he tied the three novels together and how he took you on a journey from the start to finish.
Keeping in mind that this was written in 1930, the imagination of the author is exceptional. Today, we are doing very close to that which is depicted in the book. We have gone to the Moon; we are talking about heading to Mars and beyond. We are able to take off and land on Earth. We have satellites that go out beyond our galaxy.
What more could you ask for?