Much like "The Lord of the Rings," Burroughs' Moon Trilogy is less a trilogy and more one epic novel under the somewhat lackluster title "The Moon Maid." However, the three parts were conceived and begun separately and do not continue a cohesive arc of a set of characters but are stories of three epochs in human civilization starting from first contact with lunar civilization, to conquest of the world by lunar invaders known as Kalkars, to their subsequent overthrow over three centuries later. The stories are all told by a man named Julian who claims to have "memories" of his future incarnations, where his soul seems to be reborn throughout generations of his direct ancestors. Together, this consists of some of the best work of Burroughs' entire famous and prolific writing career.
The first part is the story of the Moon Maid proper. An expedition consisting of four humans to Mars crash lands on the moon after the ship is sabotaged. They meet a variety of strange alien life forms and even civilizations of intelligent humanoids deep under the lunar surface. The tyrannical Kalkars, assisted by a treacherous human from the expedition, learn the technologies of weapons of mass destruction, which they use to conquer their peace-loving cousins and later to invade the Earth. This section is more typical of Burroughs' pulpy style, familiar territory to fans of his Pellucidar and Barsoom series.
But the second part is a reworked dystopian narrative originally about the aftermath of the takeover of America by Soviet Russia. Instead of the Soviets, the Kalkars have reduced humanity back to a feudal agrarian lifestyle where earthlings are under strict dictatorial control to prevent free thought, religious worship, and private property in order to prevent revolution. However, they clearly hadn't learned anything of the history of human colonialism, and their increasingly exploitative taxation and treatment of the farmers leads to the seeds of revolt. This section is unusually dark and political for Burroughs', showing the true range he was capable of as a writer.
Three hundred years later, the Kalkars have sufficiently interbred with humans so that they have forgotten much of the technology that made them a formidable conquering force, and the humans largely consist of nomadic tribes with cultures modeled after the native Americans, who worship the American flag as a kind of totem though they have long forgotten the original purpose.
Endlessly fascinating, inspiring a true sense of wonder and epic adventure, this is a highly entertaining classic of science fiction, and a must-read from the Radium Age. It loses a star because of it's awkward structure, shoehorning in a pulp space opera romance into a much darker post-apocalyptic political yarn. And when I say dark, I mean it. Heroes and children alike are killed off unceremoniously or quite brutally. So the tone is very inconsistent.
In addition, having a story spanning centuries in the future be told in the first-person by a single man from the perspective of his ancestors is awkward, unexplained, and unnecessary. Julian first begins the story to a fellow traveler on a dirigible, and I could not help but picture the listener getting up a quarter of a way through and saying, "Okay, that's nice, Mr. Crazy Person, but I gotta be going!" But that doesn't happen. I can only assume the man had tons of patience and zero hobbies to listen for hours to how brave, awesome, and essential Julian's ancestors were throughout the entire history of a supposed conquest of the Earth by men from the moon.
I know you guys who frequently read science fiction are capable of suspending disbelief during even the most outrageous fantasies, but some parts of this book you just can't buy into. So one human was able to teach a small civilization of moon men who still fought with swords and spears the secret of space travel AND how to develop weaponry capable of subduing an entire planet exponentially larger than their world? All in less than the span of a few years? Okay. Sure. Not to mention the fact that the moon people are genetically and morphologically similar enough to breed with humans. That's never explained. And speaking of lack of explanation, early in the novel, Julian points out a girl dancing in a lounge and tells his listener that he will meet the girl as one of his future incarnations. How that is possible or who the girl was supposed to be is never explained because the idea is forgotten.
But despite all of this lack of polish, I highly recommend this to any fan of sci-fi and fantasy, as well as anyone looking to be introduced to the work of Edgar Rice Burroughs. Also, for you John Carter fans out there, these lunar tales take place in the same fictional universe as the Mars series, and even the spaceship that makes first contact with the Kalkars is called "The Barsoom." Just in case you were wondering...