Expiration Day

Name: Expiration Day
Price: 11.99 USD
Availability: InStock
Rating: 4.2 (78 reviews)
Author: Powell, William Campbell

by Powell, William Campbell

Science Fiction Young Adult

4.2 (78)

4.2 stars from 78 reviews

332 pages~5.5 hr readPublished by Tor Teen

$11.9933% off peak

Last checked: Apr 27, 2026

Hidden GemHighly rated but flying under the radar. Fewer readers have found this one yet.

Price history: $0.50 – $17.99

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: $0.50 – $17.99

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Perfect for you if...

You're drawn to sci-fi that explores identity and what makes us human, told through a deeply personal lens rather than grand world-building.
You enjoy diary-format narratives that feel intimate and immediate, giving you direct access to a character's emotional journey.
You appreciate YA that doesn't shy away from loss and the bittersweet reality of growing up alongside people you can't save.

Maybe not for you if...

You want action-driven plots with clear antagonists and high-stakes conflict. This is quieter and more introspective.
You prefer standalone novels. This is a standalone but dwells in ambiguity rather than providing neat resolution.
You're looking for light, fun reads. The central premise involves manufactured beings designed to be destroyed at eighteen.

About this book

In 2049, humanity faces extinction. Tania Deeley is a rare human child in a world where most children are teknoids—sophisticated androids manufactured by Oxted Corporation. When global fertility declined, these near-perfect human copies were created to prevent societal collapse. Tania has always known teknoids exist, but on her first day at The Lady Maud High School for Girls, she suspects her best friend Siân may be one. Returning from summer holiday, Siân has changed dramatically. Could Oxted have engineered these changes? If Siân is a teknoid, how many others in Tania's life are not human? Driven to understand what distinguishes teknoids from humans, Tania searches for answers. But time is critical: teknoids must be returned to Oxted on their eighteenth birthday, never to be seen again. Told in diary format, this debut novel follows a young girl coming of age as she discovers what it means to be truly human.

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Price History

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

$0.50 – $17.99

Currently on sale at $11.99 — 33% off peak. Price has dropped 14 times over the last 12 months. Goes on sale roughly every 28 days. Typically stays discounted for 12 days.

Sales Rank

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

Currently around #1,218K in the Kindle store — a niche title. Climbing the charts — 31% improvement recently.

Rating & Reviews

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

Currently 4.2★ from 78 reviews

Review activity has been quiet recently. Rating has dipped slightly from 4.4 to 4.3.

Sale Prediction

Actual Predicted

This book is currently discounted at $11.99. It typically returns to around $17.99.

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.