Classic science fiction.
Written in 1951. Fairly well ahead of the "come-true" aspects of a futuristic novel.
Clasic Sci-Fiction. Similar to Farmer in the Sky or Have Space Suit Will Travel. Nothing profound, no new ideas, really it is just fantasy with rocket ships. Still entertaining, still well written.
Classic Heinlein from his "juvenile" series but would be of interest to any science-fiction fan. You just have to understand when it was written (the 1950's) to appreciate it's wholesomeness.
One of Heinlein's early juveniles, originally published in 1951 as a follow-up to magazine serialization. This Ace Books No. 05501 was published Oct 1975. An exciting tale, with some Heinleinian satire in its plot and characterizations, but little of the later bite.
