Quicksilver & Brimstone — The Indie Romantasy Phenomenon You Need to Know

If you've scrolled through BookTok or browsed the romantasy shelf of your favorite indie bookshop lately, chances are you've seen a molten gold and deep purple cover with one word: Quicksilver. This indie romantasy debut by Callie Hart has exploded in popularity—and for good reason.

A blend of elemental magic, slow-burn enemies-to-lovers romance, and visceral worldbuilding, Quicksilver delivers everything romantasy readers crave: high stakes, steamy tension, and a heroine learning to own her power. And now, with its sequel Brimstone on the horizon, readers are bracing for what promises to be an even darker, more emotionally charged ride.

What Is Quicksilver About?

Set in a richly imagined desert kingdom fractured by war, Quicksilver follows Saeris, a young woman whose forbidden magic could tip the scales of a brutal conflict. Trained to be invisible, Saeris hides her power from the ruling elite—until she’s captured by Kingfisher, a brooding warrior king whose motives are as dangerous as his blade.

What follows is a slow-burn collision of wills. Think fated mates meets alchemy meets political rebellion. Hart’s writing is sharp, seductive, and layered with emotional grit. And the elemental magic system—especially the sentient, semi-conscious force of Quicksilver itself—is one of the most unique in the genre.

Why Did It Go Viral?

The rise of Quicksilver can be credited to several key elements:

• Indie Romantasy Boom: Readers are flocking to indie-published fantasy romance for its creative freedom, bold tropes, and high heat levels.

• BookTok Momentum: Clips showcasing steamy quotes and emotional devastation gave Quicksilver viral traction, especially among fans of Fourth Wing and Plated Prisoner.

• Satisfying Tropes: It delivers enemies to lovers, reluctant alliances, magical training, and a heroine coming into her own.

What We Know About Brimstone

The sequel, Brimstone, promises to raise the stakes—and the heat. Early teasers hint at fractured alliances, deeper dives into Saeris’s connection to the Quicksilver, and dangerous new enemies rising from the shadows.

Excitingly,  Brimstone is set to arrive 18 November 2025. Advanced readers and ARC reviewers are already calling it "bolder, bloodier, and more unhinged." We can expect:

• The return of all major characters from Quicksilver

• New POVs (including fan-favorite side characters)

• Major reveals about the origin of the Quicksilver force

• High-spice scenes in even higher-stakes situations

Where to Get It

You can grab your copy of Quicksilver—and pre-order Brimstone—from The Enchanted Spine, where we specialise in fantasy romance, beautifully curated book boxes, and magical reading experiences.

Shop Quicksilver Now

Whether you're already obsessed with Saeris and Kingfisher or you're just discovering this molten-hot world, one thing’s clear: Brimstone is one of the most anticipated romantasy releases of the year.

Are you ready?