Finished reading book 2 in the Battle Of Earth (6 more books to come), the grand finale of The Horus Heresy series (about 60 books + side stories, excluding BOE) taking place around the 25th Millenium. If you like to get immersed in a universe for a year or two, this is for you.
The Horus Heresy was simply a vague reference in books of the Warhammer 40,000 series. Fans kept asking questions about it, until Games Workshop decided to commission the writing of three books to tell the story of Horus; but in no time the Horus Heresy grew to library size.
Been reading and collecting the books for two years now.
The setting is a mixture of medieval and high tech. Basically, scientific and technological knowledge has largely been lost through wars and disasters, as well as an uprising of machines against humans that happened 20,000 years earlier, and humans barely survived. So the tradition is that machine AI is prohibited, eternally. But they do have "servitors", which sre machines with discarded human brains trained for a particular job.
Thing is, nobody knows how machines work, but there are machines that can make or repair machines, so human knowledge isn't necessary. However, most of the production machines are on Mars, and the colonies of Mars, under the control of priests of the Machine God religion, who claim to know how the machines work and nobody disputes their claim. But so, that's how the cultural environment is religious and medieval, while having futusistic space travel technologies.
But since a few thousand years earlier, Earth has been ruled by a giant being, extremely wise, knowledgeable, benevolent dictator without a name... The Emperor, about 3 or 4 times the size of a normal human. And he embarks Humanity into a clensing of the Milky Way Galaxy from all xeno races, and finding splinters of humanity out there that became lost after an abortive expansion of Humanity that had happened 10 millenia earlier. But if those splinters of humanity have developed a religion, or any kind of superstitions they must give them up or be destroyed. So, this is a galactic campaign of objectivist elightenment, you might say.
And it starts very good, but then everything goes wrong...
