It's a simple tale, so hearty it almost busts its space-britches with Martian derring-do. Tom, and his two best pals Roger and Astro, are licked into shape as Space Cadets on the Solar Guard's Martian camp. Various training exercises, rocket flying, lots of 'Tom Brown in Space' style bonding, one bout of fisticuffs and a lengthily described game of Martian football fill most of the book, over the course of which Tom, Roger and Astro prove themselves the very best cadets the Solar Guard has ever seen. The adventure ante is upped near the end, when our three pals find themselves marooned in the midst of the scorching Martian desert; but with pluck, resourcefulness and endurance, they manage the trek back to base.
"And you mean to tell me you walked across that desert?" asked Captain Strong.Much of the pleasure of reading this, to be honest, is in the oaths. I don't think I could ever grow tired of 'By the craters of Luna!' and 'Well, blast my jets!', of 'Space gas!' and 'Put me down, you big Venusian ape!' Other than that it's pretty much a by the numbers, Boys Own yarn. On the plus side, though, there are pictures; and they're splendid. Here's the frontispiece:
Tom glanced over at Astro and Roger. "We sure did, sir."
"With Astro doing the last stretch to the canal carrying me and dragging Tom," said Roger.
... Enlisted Solar Guardsmen and officers of the Solar Guard stood around staring in disbelief at the three dishevelled cadets. "But how did you ever survive?" asked Strong. "By the craters of Luna, that blasted desert was hotter this past month than it has ever been since Mars was first colonised by Earthmen!" 
The Solar Guardsman directed the stream of urine high in the air, vaulting not only the Monorail Car but also the stack of old magazines balanced on its canopy, and hitting the enormous metal "1" right on the nose.
In many ways Roger preferred traditional, pre-Robot-Domination Christmas trees.
If the sphincter closed completely the Bowel bots might be trapped inside for hours.
Tom gestured delightedly at the mess: his massive bionic testicles had not let him down.
The illustration on the inside front and back covers, though, is rather lovely: