The Probability Broach

Name: The Probability Broach
Price: 12.35 USD
Availability: InStock
Rating: 4.5 (236 reviews)
Author: L. Neil Smith

by L. Neil Smith

Literary Fiction Science Fiction

4.5 (236)

4.5 stars from 236 reviews

305 pages~5.1 hr readPublished by OrbPublished 1979-01-01

$12.35Deal20% off peak

Last checked: Jul 20, 2026

Price history: $2.99 – $15.50

While not the biggest discount we've seen for this book, it's still a great deal and we recommend grabbing it before price returns to its normal range.

Price range: $2.99 – $15.50

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Perfect for you if...

You enjoy speculative fiction that uses wild premises to explore serious political philosophy without preaching.
You're drawn to adventure narratives that take unconventional worldbuilding seriously and make it feel lived-in.
You appreciate 1980s science fiction that's more concerned with ideas and character than fitting modern genre expectations.

Maybe not for you if...

You want your sci-fi grounded in hard science and physics rather than philosophical thought experiments.
You prefer stories that critique libertarian politics rather than explore them sympathetically.
You're looking for a fast-paced thriller where plot momentum matters more than intellectual tangents.

About this book

The quintessential Libertarian science fiction adventure from the three-time winner of the Prometheus Award, author of The Lando Calrissian Adventures. Denver detective Win Bear, on the trail of a murderer, discovers much more than a killer. He accidentally stumbles upon the probability broach, a portal to a myriad of worlds—some wildly different from, others disconcertingly similar to our own. Win finds himself transported to an alternate Earth where Congress is in Colorado, everyone carries a gun, there are gorillas in the Senate, and public services are controlled by private businesses."Contained ideas I wish could be shouted to the world, ideas that come from the American heritage of freedom and which could bring still greater individual liberty, greater technical progress." ―Vernor Vinge, three-time Hugo Award-winning author "Pick up a new copy of the book and rediscover this exciting world, and reserve me a table at Meep's Texas Barbecue." ―Prometheus Read more

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We track price drops, sale patterns, and predict when this book will go on offer next.

Price History

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

$2.99 – $15.50

Price has dropped 15 times over the last 6 years. Goes on sale roughly every 43 days. Typically stays discounted for 140 days.

Sales Rank

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

Currently around #270K in the Kindle store — a niche title.

Rating & Reviews

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

Currently 4.5★ from 236 reviews

Gaining approximately 1 new review per month. Rating has remained stable at 4.5 over the tracking period.

Sale Prediction

Actual Predicted

Based on past patterns, a price drop could happen soon. It typically goes on sale every 42 days and the last drop was 163 days ago. Typical discount: 81% off.

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.

Curious how prices and deals move across the whole Kindle store? See the latest findings in The Kindle Report