"The Horseclans" is a series of novels by Robert Adams. They take place in a post-apocalyptic world, in North America.

• After the End: When the stories mostly take place (with a few flashbacks to 20th-century America here and there).
• Amazon Brigade: The Moon Maidens
• All Amazons Want Hercules: After losing their valley home, they tend to pick the manly men
• Alliterative Name: Milo Morai
• Author Appeal: Addams liked Armenians enough to write them into the book.
• Author Existence Failure: Robert Adams died before the series could be wrapped up.
• Bigfoot, Sasquatch, and Yeti: The Kleesahk
• Blessed with Suck: While being Undying has lots of good things about it — immortality, for one — it does have drawbacks. Like sterility. And being very prone to amnesia after a few centuries.
• Blind Seer: Blind Hari Krooger
• Brother-Sister Incest: One of the pairs of Undying.
• Canon Sue: Milo Morai is treated that way in the first chapter, which is dedicated to showing how awesome he is.
• The Chosen One: Milo Morai not only wrote the prophecies, he made sure to choose himself to fill it.
• Combat by Champion: Featured in the first book between Milo Morai and Lord Demetrios
• Cool Horse: They are called the Horseclans.
• Corrupt Church: Several of these — Adams did not like churches, it seems.
• Depraved Bisexual: Quite a few of the Ehleen nobles.
• Did Not Do the Research: "New Greece" should be "Nea Ellas," not "Kenooryos Ellas."
• Eternal English: Averted, though mostly shown in names.
• Girl-On-Girl Is Hot: Male homosexuality or bisexuality is treated as disgusting, but sex scenes among the "Moon Maidens" are portrayed as awesome -- and in great detail.
• Ghostapo: Hitler was one of the Undying, with incredible psychic powers.
• Grand Theft Me: The Witchmen do this quite a bit — with mechanical assistance at first, but later on, at will.
• Hidden Elf Village: Milo Morai spends a couple of centuries looking for one of these.
• Humans Are Psychic in the Future: Also the cats, horses, and whales.
• Incest Is Relative: The Horseclans culture has no such taboo. The father of the brother-sister Undying couple mentioned above states that he sees nothing wrong with his son and daughter being in love, and adds that two of his grandparents were also a brother-sister pairing — who were evidently permitted to marry each other. (At least, Undying being sterile means there's no danger of inbreeding.)
• Keep Circulating the Tapes: Most of the books have not been reprinted.
• Magical Negro: The Zartogahn characters are almost always doctors.
• Martyrdom Culture: The Sword Cult
• New Age Retro Hippie: The Ganiks.
• No One Could Survive That: How many of the Undying are revealed.
• Omniglot: Several of the older Undying, especially Milo Morai.
• Panthera Awesome: The Prarie Cats especially when garbed for war
• Really Seven Hundred Years Old: All of the Undying eventually, but in particular Milo Morai and Clarence Bookman
• Self-Fulfilling Prophecy: Milo Morai wrote his own prophecies.
• Sequelitis: Some of the books fall into this.
• A Threesome Is Hot: Several characters have more than one wife at a time. Not so much the other way.
• The Women Are Safe with Us: Averted, captured women are given as slaves. Not Children though.