Heart of Iron

Name: Heart of Iron
Price: 2.99 USD
Availability: InStock
Rating: 4.2 (312 reviews)
Author: Ashley Poston

by Ashley Poston

Science Fiction Romantasy

4.2 (312)

4.2 stars from 312 reviews

482 pages~8 hr readPublished by Balzer + BrayPublished 2018-01-01

$2.99Deal81% off peak

Last checked: Jul 3, 2026

Price history: $1.99 – $15.99

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Price range: $1.99 – $15.99

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Fans of these authors will like this...

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Fans of these books will like this...

Red Queen
Firefly (the series)
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Perfect for you if...

You love space opera with real heart. Firefly and The Expanse scratched an itch, and you want more ragtag crews and found family dynamics.
You're after romance that builds slowly between characters who start as rivals. The banter and tension matter as much as the kiss.
You want a female lead who's actually competent and flawed. Ana's a thief and a scoundrel, not a chosen one waiting to discover her power.

Maybe not for you if...

You prefer standalone novels. This is book one of a series, and the ending leaves threads intentionally open.
You want a plot driven purely by action. There's genuine character work and relationship building that slows the pace in places.
You're looking for grimdark or morally grey characters. This skews younger and more optimistic about redemption than Game of Thrones.

About this book

Heart of Iron reimagines the legends of Anastasia Romanov as a science fiction space opera. Seventeen-year-old Ana is an outlaw who was found as a child drifting through space with D09, a sentient android and one of the last remaining illegal Metals. Raised by a fearsome space captain and her crew, Ana now desperately seeks a way to fix D09, who has been glitching. Ana's quest to save D09 leads her to steal the coordinates to a lost ship that might hold answers. However, a spoiled Ironblood boy obtains the coordinates first for his own reasons. When their plans go wrong, Ana and the Ironblood become fugitives hunted by their entire kingdom—and not everyone wants them alive. Their journey into a lost corner of the universe unearths dangerous secrets and forces Ana to face an impossible choice: protect a kingdom that wants her dead or save the Metal boy she loves. The story combines action, romance, and science fiction elements across an intergalactic adventure.

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Price History

Kindle price over time. Green zones = periods when the book was free.

$1.99 – $15.99

Currently on sale at $2.99 — 81% off peak. Price has dropped 15 times over the last 6 years. Goes on sale roughly every 151 days. Typically stays discounted for 51 days.

Sales Rank

Amazon sales rank: lower number = better selling book. #1 is the bestseller.

Currently around #24K in the Kindle store — a steady mid-list seller.

Rating & Reviews

Purple line = star rating over time. Blue area = total review count growth.

Currently 4.2★ from 312 reviews

Gaining approximately 2 new reviews per month. Rating has remained stable at 4.2 over the tracking period.

Sale Prediction

Actual Predicted

This book is currently discounted at $2.99. It typically returns to around $15.99.

Prices shown in USD from Amazon US. We continuously pull new data to improve tracking. If dates look old, it usually means there has been no significant change since the last data point.