Good story, though a bit aged since it was written from 60 years ago, with interesting characters and a good imagination. Language is also a bit dated, but nothing serious, mostly colloquialisms. Story line is continuously interesting and narration was really good! Differentiation in voice tone and fluctuation was great, giving each persona a distinct characteristic. Descriptions in the story are colorful and metaphorical. Very good book and narration all around!

I love Robert heinlin. This early Book reveals his basic understanding of science fiction writing. His later writing is so much more sophisticated and entertaining. This was written for juvenile readers. I like the later which is for adults.