Quicksilver review: heat level and tropes

Quicksilver is a thief, a fae warrior who would rather not need her, and a world on the far side of a door that should have stayed shut. Heat 3 of 5, and it sits at the hot end of the 3. Enemies to lovers, slow burn. The publisher says 17 and up. If your sister already pushed it on you, here's what's on the tag.

The rings that sold best at my kiosk were never the ones the mall's buyer sent us. They were the ones a customer walked in asking for by name because her sister had one.

Quicksilver came in by name.

The cover promises a thief, a door and a man with a sword

The setup, through the first act and no further. Saeris Fane is twenty-four. She hides an alchemical gift and steals from the Undying Queen. She gets caught. She reopens a gateway that has been dormant a long time and comes out in a country of ice and snow, where the Fae are real and have been at war for centuries. By accident, she binds herself to Kingfisher, a secretive Fae warrior who means to use her power for his people.

He means to use her. She can't get loose.

That's the deposit.

Callie Hart published it herself on June 4, 2024. By September, The Bookseller was reporting a "hotly contested" ten-way auction for UK rights. Forever put out a 624 page paperback on December 3, 2024, and the hardcover came after it, in August 2025. Hachette's page calls it an instant number one New York Times bestseller.

Paperback first, hardcover later. Romance has done it that way before. In 1972 Kathleen Woodiwiss's The Flame and the Flower was turned down by hardcover houses for being too long, pulled out of Avon's slush pile, and became the first single-title romance published as an original paperback. Fifty-odd years later the slush pile is a Kindle store and the readers do the pulling.

Where it keeps the promise

The binding is the proximity, and it's on the page early. Nobody has to fake a snowstorm to keep these two in one room. The magic signed the slip for both of them before either one could read it.

The enemies half is played straight. Amy Suto, reviewing it, calls the romance "a true slow burn." Slow burn is the one trope where the wait is the product. Hart charges full price for it, and I didn't mind paying.

When the heat comes, it's real. Luna Gauthier at The Cosmic Circus called it "heart-racing," and I won't argue.

Where it does not

It's a 3 on my scale, the top of the 3, and I want to be exact.

Do Good With Books lists closed-door modifications for chapters 22, 27 and 37. Three chapters. That's where the open door is. Suto rates it three chilis of five and puts it plainly: "It is spicier than A Court of Thorns and Roses book one and less explicit than From Blood and Ash." On my tag that is a 3 that runs warmer than ACOTAR's 3. Three scenes in a book The Cosmic Circus puts at "over 600 pages" is not frequent, so it isn't a 5.

The notes matter more than the heat here. Hachette says "graphic violence and adult situations," for readers 17 and up. Do Good With Books lists war, blood and gore, murder, a decapitation, suicidal thoughts, infertility, a forced sterilization recounted, and the death of parents recounted. Read that list before you read the book. It's a long damn list for a book people hand their sisters.

And it's book one of a trilogy, so the love story doesn't close here. The ending you're owed is coming, two Fridays from now. Hachette says the series has sold over three million copies, so plenty of people have already put their deposit down.

Readers ask

Is Quicksilver spicy?

Yes. It's a 3 on this site, at the hot end. Amy Suto rates it three chilis of five and says it's spicier than A Court of Thorns and Roses book one and less explicit than From Blood and Ash. Do Good With Books flags chapters 22, 27 and 37.

What age is Quicksilver for?

Hachette lists it for readers 17 and up, for "graphic violence and adult situations." It is an adult book.

Was Quicksilver self-published?

Yes. Callie Hart self-published it on June 4, 2024. Hodderscape won the UK rights in a ten-way auction that September, and Forever published the US paperback on December 3, 2024.

Is Quicksilver like ACOTAR?

Close. Both are fae romantasy with the door open, and both start a series. On heat, Suto puts Quicksilver above ACOTAR book one and below From Blood and Ash.

Who should read it

Read it if you like enemies to lovers with the middle stretched long and tight, a heroine with sticky fingers, and a door to another world. Read it if you want the book your group chat is going to bring up anyway.

Skip it if the notes above are a hard no, or if you want the whole story in one cover.

Sources, opened 3 November 2026: Goodreads' editions list for the self-published, Forever and hardcover dates and page counts; The Bookseller (Katie Fraser, 12 September 2024) on the Hodderscape auction; Hachette's Quicksilver page for the setup, the trilogy, the age line, the bestseller claim and the series sales; Do Good With Books for the content notes and chapter list; Amy Suto and The Cosmic Circus for the heat and the length; Wikipedia's The Flame and the Flower article for the Woodiwiss history. The heat scale is this site's own.