Hex (Sentinel Security Book 6)

Hex (Sentinel Security Book 6)

by Hackett, Anna

4.7 (5,600)

4.7 stars from 5,600 reviews. One of the highest rated Romance books we track.

Published by Anna Hackett

$3.99At peak price

Last checked: Apr 24, 2026

Must ReadHighly rated with thousands of reviews. A proven favourite.
Price history: $3.99 $3.99

Buy now — this is the lowest price we've seen.

Price range: $3.99 $3.99

Buy on Amazon - $3.99

0 readers are tracking this book's price

Fans of these authors will like this...

  • Neon Blake
  • Tessa Bailey
  • Suzanne Brockmann

Fans of these books will like this...

  • Into the Crossfire
  • The Protectors
  • Heated Pursuit

Perfect for you if...

  • You love spy thrillers with genuine romantic tension that doesn't overshadow the plot.
  • You're drawn to clever heroines who solve problems with brains rather than just brawn.
  • You enjoy series books where you already know and care about the supporting cast.

Maybe not for you if...

  • You prefer romance where the relationship is the main event, not the mission.
  • You want slow-burn chemistry that develops over time rather than immediate sparks.
  • You're looking for standalone books rather than part of a longer series.

About this book

Hex is a skilled hacker who works for Sentinel Security, providing her team with information and communication channels. She prefers her technical work to fieldwork, though she sometimes wishes she had better luck with relationships—particularly with Shade, an undercover operative she finds both attractive and irritating. Shade, whose real name is Cain, is a dedicated spy who works dangerous missions in service to his country. He has no personal attachments and lives only for his assignments. When he needs Hex's expertise for a critical operation, the two must work together undercover to prevent advanced drone plans from falling into enemy hands. As they collaborate, evade danger, and confront criminals, the attraction between them intensifies. For the first time, Cain finds that another person matters more to him than his mission.

Get the best deal every time

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.

Sign up to unlock
Free$2.00$3.99Jul '23Mar '26Apr '26
$3.99$3.99

Price has been stable at $3.99 for 3 years. This book rarely goes on sale.

Sales Rank

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

Sign up to unlock
#16#13,512#27,007Jul '23Jan '24Sep '25Apr '26

Currently around #27K in the Kindle store — a steady mid-list seller. Sales have softened 59% recently.

Rating & Reviews

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

Sign up to unlock
4.0★4.5★5.0★Jul '23Jul '23Feb '25Feb '25Jan '26RatingReviews

Currently 4.7★ from 5,600 reviews

Review activity has been quiet recently. Rating has dipped slightly from 5.0 to 4.7.

Sale Prediction

Sign up to unlock
Free$2.00$3.99Jul '23Mar '26Apr '26PredictedApr '26

Actual Predicted

This book hasn't had a significant price drop in our tracking period. We'll alert you if that changes.

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.

Never miss a deal on this book

Create a free account to unlock full price history charts, sale predictions, and get notified instantly when the price drops.

Hackett, Anna

2 books on Vagrant Press

View all books →

More Romance books you might like

View all Romancebooks →
Rent-A-Girlfriend Vol. 4      Kindle & comiXology
Rent-A-Girlfriend Vol. 4 Kindle & comiXology

by Reiji Miyajima

$5.99Deal
4.9 (1,047)
$5.99$7.99
The Peasant King
The Peasant King

by Tessa Afshar

$12.82Deal
4.8 (1,206)
$2.99$16.99
My Little Monster Vol. 12      Kindle & comiXology
My Little Monster Vol. 12 Kindle & comiXology

by Robico

$5.99Deal
4.9 (229)
$5.99$10.44

Today's Best Deals

View all deals →
Love and Other Words
Love and Other Words

by Christina Lauren

$2.99Deal
4.5 (52,557)
Leviathan Wakes (The Expanse Book 1)
Leviathan Wakes (The Expanse Book 1)

by James S. A. Corey

$2.99Deal
4.6 (59,406)
$2.99$9.99
Ugly Love: A Novel
Ugly Love: A Novel

by Colleen Hoover

$2.99Deal
4.6 (169,313)
$2.99$2.99
The Hit (Will Robie Book 2)
The Hit (Will Robie Book 2)

by David Baldacci

$1.99Deal
4.5 (52,796)
$1.99$11.99
Lilac Girls: A Novel
Lilac Girls: A Novel

by Martha Hall Kelly

$1.99Deal
4.5 (57,081)
$1.99$13.99
Buy Hex (Sentinel Security Book 6) on Amazon - $3.99

Affiliate link. We may earn a small commission at no extra cost to you.

Hex (Sentinel Security Book 6) ($3.99) | Vagrant Press