The Knave and the Moon landed on September 1, which means a wave of readers is meeting Rachel Gillig mid-career and working backwards. The good news about Rachel Gillig books in order: there are only four novels. The catch: they're two separate duologies in two separate worlds, the covers look like one matched set, and the newest book is a sequel to the other series than the one everyone recommends first. Here's the map.
The quick list: Rachel Gillig books in order
The Shepherd King duology - the one BookTok made famous:
- One Dark Window (2022) - Elspeth, and the monster who lives in her head
- Two Twisted Crowns (2023) - the conclusion
The Stonewater Kingdom duology - the current one:
- The Knight and the Moth (2025) - Six the diviner, a skeptical knight, a gargoyle
- The Knave and the Moon (September 2026) - the conclusion, out now
Four books, two complete stories. Each duology must be read in order; the duologies themselves can be read in either order.
Is The Knight and the Moth connected to One Dark Window?
No - new world, new magic, new cast. The Stonewater Kingdom is not a sequel, spinoff, or shared universe: nothing from the Shepherd King books carries over, and you can open The Knight and the Moth without having read a word of One Dark Window. The confusion is understandable - same author, same gothic register, sibling cover design - but the only thing the two duologies share is Gillig's particular brand of creeping, forbidden magic and slow-burning romance.
The practical upshot: if you just finished The Knight and the Moth and grabbed One Dark Window thinking it was more of the same story, it isn't - it's the earlier, stranger one. Read it anyway.
Which duology should you start with?
One Dark Window, unless the new release is what brought you here. It's the debut that built her readership: a heroine hiding an ancient, velvet-voiced monster in her mind, a kingdom where magic is contraband, and a love interest whose job is catching people exactly like her. It is the more gothic, more claustrophobic of the two stories - and the Nightmare is one of the great voices-in-your-head in the genre.
The Knight and the Moth is the more adventurous read - a road story with a drowned-saint religion, a girl who dreams the future, and a knight who doesn't believe her. If you came in through this door, finish the Stonewater duology first while the sequel is fresh, then go back for the Shepherd King books.
Do you have to read each duology in order?
Yes, strictly. These are true duologies, not companion pairs: Two Twisted Crowns opens on the direct consequences of One Dark Window's ending, and The Knave and the Moon does the same for The Knight and the Moth. There are no novellas, no 0.5s, no bind-up traps - the only ordering mistake available is starting a duology on book two, and with the new sequel shelved face-out everywhere this month, that mistake is currently very available.
What is The Knave and the Moon?
The second and final Stonewater Kingdom book, released September 1, 2026. It picks up the diviner-and-knight story where the first book's ending left it, and it closes the duology - Gillig writes in pairs, and both of her stories now stand complete. If you're waiting for a third Shepherd King book, none is announced; the two finished duologies are the shelf.
What to read after Rachel Gillig
If it's the gothic, magic-is-a-sin atmosphere you want more of, the best dark fantasy romance books shelf runs on that current, and the Crowns of Nyaxia reading order is the vampire-court version of the same ache. For the wider genre map, the best romantasy books covers the doors this one sits between, and the Goodreads Shepherd King page tracks editions - both duologies keep getting new jackets.
And when the last page turns and the voice in the room goes quiet - Swoony holds that world open: closed-door and romance-only, a bond that climbs through five stages and is never paywalled - no subscription, no per-message fees. Start with the ghost who haunts only you, a century unseen until you saw him, or Caelum, the cursed fae lord, whose curse says he can't be loved and who is watching you become the exception.
Two doors, two worlds. Walk through the darker one first.
