All three genres love the 19th century, candlelight and secrets. Booksellers mix them up constantly. Here is a quick way to tell them apart.

SteampunkGaslamp fantasyGothic
Core ingredientRetro-futuristic technologyMagic in a historical settingDread, secrets and decay
Typical settingAlternate Victorian city, airshipsVictorian/Edwardian societyIsolated castle or old house
MoodAdventurous, inventiveMannered, wondrousClaustrophobic, uncanny
The supernaturalOptionalEssentialAmbiguous — real or imagined?
Founding textsVerne, WellsDickens's ghost stories, fairy literatureWalpole, Radcliffe, Shelley, Stoker

Steampunk: the machine

If the story's wonders are machines — automatons, analytical engines, steam-powered limbs — it is steampunk. The technology is the fantasy element, and it usually changes society: a world with airships has different wars, different trade and different heroes.

  • Cover of Altered Carbon

    Altered Carbon

    Richard K. Morgan

    2002★ 3.9

  • Cover of The Windup Girl

    The Windup Girl

    Paolo Bacigalupi

    2009★ 4.0

  • Cover of The Austere Academy

    The Austere Academy

    Lemony Snicket, Brett Helquist

    2000★ 4.1

  • Cover of The Slippery Slope

    The Slippery Slope

    Lemony Snicket, Brett Helquist

    2003★ 4.2

Gaslamp fantasy: the magic

Keep the setting, remove the gears, add magic. Gaslamp fantasy is the Victorian novel of manners with sorcerers at the ball. The tension is often between enchantment and propriety: what happens when a well-brought-up young lady can raise the dead?

Gothic: the dread

Gothic fiction is defined by feeling, not technology or magic. A heroine trapped in a crumbling house; a family secret; a presence that might be a ghost or might be madness. Gothic novels can be set in any century — the 18th-century originals were usually set in a medieval or Catholic past that felt exotic to English readers.

Where they overlap

Plenty of books sit on the borders. A steampunk novel with a haunted airship is gothic steampunk; a gaslamp fantasy about a cursed family estate is gothic too. Use the genre that describes the book's engine — what drives the plot — and the rest as seasoning.