Cachalot (Humanx Commonwealth)

Name: Cachalot (Humanx Commonwealth)
Price: 2.99 USD
Availability: InStock
Rating: 4.2 (471 reviews)
Author: Alan Dean Foster

by Alan Dean Foster

Mystery Thriller Science Fiction

4.2 (471)

4.2 stars from 471 reviews

$2.99KU80% off peak

Last checked: Jun 16, 2026

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Price history: $1.99 – $14.99

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Price range: $1.99 – $14.99

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James S.A. Corey
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Fans of these books will like this...

Solaris
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Perfect for you if...

You love first-contact stories that flip the script and make you sympathise with non-human intelligence.
You're drawn to mysteries set in genuinely alien environments where the setting itself feels like a character.
You appreciate hard sci-fi that explores what happens when we finally meet minds as complex as our own.

Maybe not for you if...

You want fast-paced action from page one; this builds atmosphere and tension methodically.
You prefer land-based adventures; nearly the entire novel takes place on water or beneath it.
You're looking for human heroes to root for; the real intelligence here belongs to the cetaceans.

About this book

Cachalot is a planet covered almost entirely by ocean, established as a refuge for Earth's marine mammals thousands of years ago after they were rescued from near extinction. Free from predators and human interference, whales have thrived there, growing in size and intelligence. When humans establish floating towns on Cachalot to exploit its natural resources, the human population begins dying at an alarming rate. A team of marine biologists is sent to the planet to investigate the deaths and uncover what—or who—is responsible for killing the settlers. Their mission carries significant danger.

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Price History

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

$1.99 – $14.99

Currently on sale at $2.99 — 80% off peak. Price has dropped 34 times over the last 3 years. Goes on sale roughly every 33 days. Typically stays discounted for 1 day.

Sales Rank

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

Currently around #105K in the Kindle store — a niche title. Sales have softened 80% recently.

Rating & Reviews

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

Currently 4.2★ from 471 reviews

Gaining approximately 10 new reviews per month. Rating has dipped slightly from 4.4 to 4.2.

Sale Prediction

Actual Predicted

This book is currently discounted at $2.99. It typically returns to around $14.99.

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.

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