In the fairly distant future a teen named Matt Dodson applied for an organization called Space Patrol - the future versions of knights in shining armor that uphold peace and justice through the known space.
The competition is fierce and only the best and the brightest get in; even the cadets are not guaranteed to get promoted to an officer rank.
We are talking early Heinlien's juveniles here, so I do not think I give a big spoiler when I say that not only Matt succeeded, but he also managed to save a day together with his cadet friends. Once again Space Patrol remained true to its principals.
When I was reading the book I could not help recalling Ender's Game. Take this well-known book, remove all edginess, bleak moments, social commentary and you end up with Space Cadet. Please note I am not saying the book is bad; it was supposed to be a mindless entertainment for young adults who do not care about romances much and as such it passes with flying colors.
The characters are two-dimensional most of the time (although I really like somewhat stereotypical Texan Tex; bad pun is not mine) and are black-and-white with minimal grey shades. On the positive side the author manages to throw in some interesting scientific facts - from physics mostly - while making them fun to read about.
All in all this is a good read lacking any deep morals of thoughts, but fun at the same time. My rating is 3 solid stars